The tension needed to tune a grand piano string with a frequency of 27.5 Hz and a length of 1.90 m is 5,129 N.
The tension required to tune the string can be calculated using the following formula:
T = (mu * v^2) / L
Where T is the tension, mu is the string's linear mass density (mass per unit length), v is the wave's speed on the string, and L is the span of the string's vibrating portion.
To begin with, we must figure out the string's linear mass density:
mu = m/L = 0.440 kg/1.8 m = 0.2316 kg/m
The speed of the wave on the string needs to be calculated next. The equation: gives the speed of a wave on a string.
sqrt(T/u),
T represents tension, and u represents linear mass density. This equation can be changed to:
T = u
The tension required to tune the string can be calculated using the following formula:
T = (mu * v^2) / L
Where T is the tension, mu is the linear mass density of the string (mass per unit length), v is the speed of the wave on the string, and L is the length of the vibrating section of the string.
First, we need to calculate the linear mass density of the string:
mu = m / L = 0.440 kg / 1.90 m = 0.2316 kg/m
Next, we need to calculate the speed of the wave on the string. The speed of a wave on a string is given by the formula:
v = sqrt(T/u)
where T is the tension and u is the linear mass density. Rearranging this equation gives:
T = u * v^2
Substituting in the values we have:
v = f * lambda
where f is the frequency and lambda is the wavelength of the wave. The wavelength can be calculated from the length of the vibrating section of the string:
lambda = 2 * L = 3.80 m
Substituting in the values we have:
v = f * lambda = 27.5 Hz * 3.80 m = 104.5 m/s
Now we can calculate the tension:
T = u * v^2 / L = 0.2316 kg/m * (104.5 m/s)^2 / 1.90 m = 5,129 N
Therefore, the tension needed to tune this string properly is 5,129 N.
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How to convert eV in kJ/mole
To convert energy in electron volts (eV) to kilojoules per mole (kJ/mol), you can use the following conversion factor: 1 eV = 96.485 kJ/mol
In physics, an electron volt is the measure of an amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum
To convert a given energy in eV to kJ/mol, you simply need to multiply the energy in eV by the conversion factor.
For example, let's say we want to convert an energy of 5 eV to kJ/mol. We can use the conversion factor to get:
5 eV x (96.485 kJ/mol / 1 eV) = 482.425 kJ/mol
Therefore, 5 eV is equivalent to 482.425 kJ/mol.
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What is the acceleration of a bike which increases its speed from 0 to 40 ft/s in 4 seconds?
The acceleration of a bike which increases its speed from 0 to 40 ft/s in 4 seconds will be 3 m/s².
How do you determine the acceleration of the bike?Given, initial speed (u) = 0
Final speed (v) = 40 ft/s = 12 m/s
Time taken = 4 seconds
From the equation v = u + at, we have
12 = 0 + a x 4
12 = 4a
a = 3 m/s²
The acceleration formula is what?The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in meters per second squared (m/s²). Since acceleration is a vector quantity, both its magnitude and its direction are included.
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Two Large, Charged Plates With Charge Density ±30µC/M^2 Face Each Other With A Separation Of 5.0 Mm. The Negative Plate Is_____
The negative plate is the one facing us because the electric field between the plates is zero, which can only happen if the two plates have the same magnitude and opposite sign of charge density.
What is charge density?
Charge density is the amount of electric charge per unit area or per unit volume of a material or object. It is usually denoted by the symbol ρ and is measured in units of coulombs per square meter (C/m²) or coulombs per cubic meter (C/m³).
In the case of a charged plate, the charge density is the total charge on the plate divided by its surface area. For example, if a plate has a charge of 60 µC and an area of 2 m², then the charge density is:
Charge density = 60 µC / 2 m² = 30 µC/m²
Charge density is an important concept in electrostatics, as it is used to describe the distribution of electric charge over a surface or within a volume. It is also used in the calculation of electric fields and forces in electrostatics, as the electric field depends on the charge density of the objects producing the field.
Two large, charged plates with charge density ±30µC/m² facing each other with a separation of 5.0 mm.
One of the plates has a negative charge density.
We want to find out which plate is negative
1. Calculate the total charge on one of the plates using the charge density and the area of the plate:
Q = ±30 µC/m² * A
Here, A is the area of one of the plates.
2. Calculate the electric field due to each plate using Coulomb's law:
E = (1/4πε₀) * (Q / r²)
Here, r is the distance between the plates, which is 5.0 mm or 0.005 m.
ε₀ is the permittivity of free space, which is a constant and has a value of 8.85 x 10⁻¹² F/m.
Since there are two plates, calculate the electric field due to each plate and then take the difference between them to get the net electric field between the plates.
3. Substitute the values and calculate the electric field due to each plate:
E1 = (1/4πε₀) * (Q / r²)
E2 = (1/4πε₀) * (Q / r²)
Here, E1 is the electric field due to one plate, and E2 is the electric field due to the other plate. Since the plates have the same magnitude of charge density, their charges will have the same magnitude too, so we can drop the absolute value sign in Coulomb's law.
4. Subtract the electric field due to one plate from the electric field due to the other plate to get the net electric field:
E = E1 - E2
E = 0
Since, the net electric field is zero, this means that the electric field due to one plate is equal in magnitude and opposite in direction to the electric field due to the other plate. Therefore, the plates must have the same magnitude of charge and opposite signs of charge density.
5. Since, one of the plates has a negative charge density is known, this means that the negative plate is the one facing us. Therefore, the negative plate is the one that we were asked to identify.
Therefore, the negative plate is the one facing us.
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Object 1 in the diagram at the right represents a proton moving perpendicularly to a magnetic field of magnitude 0.55T at a speed of 5.6 x 10^3 m/s.
a. Draw and label a vector showing the direction of the force on the proton.
b. Calculate the magnitude of the force.
Answer:
Explanation:
a. The direction of the force on the proton can be determined using the right-hand rule for magnetic fields. If the right hand is oriented such that the fingers point in the direction of the magnetic field (from north to south in this case) and the thumb points in the direction of the proton's velocity (to the right in this case), then the palm of the hand will point in the direction of the force on the proton. Using this rule, we can see that the force on the proton points downward, as shown in the diagram below:
N
|
<----|---->
| | |
| | |
|____|____|
|
S
b. The magnitude of the force on the proton can be calculated using the formula:
F = qvB
where F is the magnitude of the force, q is the charge of the particle, v is its velocity, and B is the magnetic field strength. For a proton, which has a charge of +1.6 x 10^-19 coulombs, the magnitude of the force is:
F = (1.6 x 10^-19 C)(5.6 x 10^3 m/s)(0.55 T) = 4.5 x 10^-14 N
Therefore, the magnitude of the force on the proton is 4.5 x 10^-14 N.
how did people’s general way of thinking change as a result of the scientific revolution?
The Scientific Revolution was a period of great change in the way people thought about the natural world and their place in it.
What is Scientific Revolution?Prior to this time, most people relied on tradition, religious doctrine, and ancient authorities for answers to their questions about the natural world. However, with the development of new scientific methods and technologies, there was a shift towards more empirical, evidence-based ways of thinking.One of the key changes brought about by the Scientific Revolution was a new emphasis on experimentation and observation. Scientists began to use instruments like telescopes and microscopes to observe the natural world more closely, and they developed new methods for collecting and analyzing data. This approach led to a greater emphasis on evidence-based reasoning, and it helped to promote the idea that scientific knowledge should be based on observable, repeatable experiments.The Scientific Revolution also had a profound impact on people's view of the universe and their place in it. Prior to this time, most people believed in a geocentric model of the universe, with the Earth at the center and the stars and planets revolving around it.
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How much is 1 newton to pound?
1 newton is equal to approximately 0.225 pounds.
The newton (N) and pound (lb) are both units of force, with the newton being the standard unit in the International System of Units (SI) and the pound being commonly used in the United States and United Kingdom. The conversion between the two units is not straightforward as they are based on different reference points.
However, using the conversion factor of 1 N = 0.225 lb, we can find out that one newton is equivalent to approximately 0.225 pounds. This means that if a force of 1 newton is applied, it would be equivalent to a force of 0.225 pounds.
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In which lists are major steps of solar system formation in the correct order? a. gravitational collapse of the solar nebula, accretion, condensation b. gravitational collapse of solar nebula, condensation, accretion c. accretion, condensation, gravitational collapse of solar nebula
Collapse, Condensation, Accretion lists are major steps of solar system formation in the correct order
What is the correct order in which our solar system evolved?The Sun and the planets formed together 4.6 billion years ago from a cloud of gas and dust known as the solar nebula. A shock wave from a neighboring supernova explosion most likely caused the solar nebula to collapse. The Sun formed in the center, and the planets formed in a thin disk around it.
Planets, including those in our solar system, are thought to form from dust the size of a human hair, according to scientists. They arise from the enormous ring of gas and dust that surrounds young stars. Gravity and other factors induce material within the disk to collide.
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Three different dynamic carts of different masses are rolled down a ramp. The heaviest one rolls down the ramp the fastest. Before concluding that a more massive cart will roll down a ramp faster, what experiment with these three carts might you want to do?.
Retest the carts after adding masses to each one until they are all the same mass.
What are dynamic carts ?
Dynamic carts features a strong steel body to withstand rough handling and three low friction ball bearing wheels with matching axles to ensure they travel along a true line without deviation to give accurate data.
Each cart weighs about 1.5 kg. To move a brick or any other bulk, the ends of the cart raise above the bed, and the cart bed is covered with a rubber pad. There is a clip where a tape can be attached at one end of the cart. Since the pins on each cart fit into the holes on the others, stacking them together doubled the mass.
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If the partition coefficient K for an organic compound being extracted is 9 in favor of the organic phase over the aqueous, what fraction of solute remains in the aqueous phase after 1 extraction if the same volume of solvent is used for each phase? A.0.9B.0.01c.0.9D.0.001E.0.1F,0.09
If the partition coefficient K for an organic compound being extracted is 9 in favor of the organic phase over the aqueous the correct answer is E.0.1
The fraction of solute remaining in the aqueous phase after one extraction can be calculated using the following equation:
Fraction of solute in aqueous phase = 1 / (1 + K)
where K is the partition coefficient.
Substituting the given value of K = 9, we get:
Fraction of solute in aqueous phase = 1 / (1 + 9)
= 1 / 10
= 0.1
Therefore, the fraction of solute remaining in the aqueous phase after one extraction is 0.1, which is option E.
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what would be the reading on the ammeter that is connected next to the 6.0 ω resistor?
The reading on the ammeter that is connected next to the 6.0 ω resistor would be 1.85 A.
To determine the reading on the ammeter that is connected in series with a 6.0 Ω resistor, we would need to know the voltage of the circuit and any other resistors that are in the circuit.
Assuming that the circuit consists only of a voltage source and a 6.0 Ω resistor in series with an ammeter, and that the voltage source has a constant voltage of V volts, then we can use Ohm's law to calculate the current flowing through the circuit:
I = V / R
where,
I = the current in amperes,
V = the voltage in volts,
R = the total resistance of the circuit in ohms.
In this case, the total resistance of the circuit is simply the sum of the resistance of the 6.0 Ω resistor and the resistance of the ammeter. Let's say that the resistance of the ammeter is Ra in ohms. Then the total resistance of the circuit would be:
Rtot = 6.0 Ω + Ra
The current flowing through the circuit would be:
I = V / Rtot
The reading on the ammeter would be the same as the current flowing through it. So to find the reading on the ammeter, we simply need to solve for I.
For example, if the voltage source has a voltage of 12 volts and the ammeter has a resistance of 0.5 ohms, then the total resistance of the circuit would be:
Rtot = 6.0 Ω + 0.5 Ω = 6.5 Ω
The current flowing through the circuit would be:
I = V / Rtot = 12 V / 6.5 Ω = 1.85 A
So the reading on the ammeter would be 1.85 A.
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A hydrochloric (hcl) solution has a molar concentration of 0. 0045 m, calculate the and ph of the solution. Remember that kw= 1. 0x10-14m2.
To calculate the pH of a hydrochloric acid solution with a molar concentration of 0.0045 M, we can use the following formula:
How to calculate pH?pH = -log[H+]
where [H+] is the concentration of hydrogen ions in the solution, which can be calculated from the dissociation of HCl:
HCl → H+ + Cl-
The molar concentration of H+ is equal to the molar concentration of HCl, which is 0.0045 M.
[H+] = 0.0045 M
Substituting this value into the pH formula, we get:
pH = -log(0.0045) ≈ 2.35
To calculate the pOH of the solution, we can use the relationship:
pH + pOH = 14
pOH = 14 - pH ≈ 11.65
Finally, we can use the relationship between pH, pOH, and the ion product constant of water (Kw) to calculate the concentration of hydroxide ions ([OH-]) in the solution:
Kw = [H+][OH-] = 1.0 × 10^-14 M^2
[OH-] = Kw / [H+] = (1.0 × 10^-14) / (0.0045) ≈ 2.22 × 10^-12 M
Therefore, the pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately 2.22 × 10^-12 M.
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The pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately [tex]2.22 \times 10^{-12} M[/tex].
How to calculate pH?pH = -log[H+]
where [H+] is the concentration of hydrogen ions in the solution, which can be calculated from the dissociation of HCl:
HCl → H+ + Cl-
The molar concentration of H+ is equal to the molar concentration of HCl, which is 0.0045 M.
[H+] = 0.0045 M
Substituting this value into the pH formula, we get:
pH = -log(0.0045) ≈ 2.35
To calculate the pOH of the solution, we can use the relationship:
pH + pOH = 14
pOH = 14 - pH ≈ 11.65
Finally, we can use the relationship between pH, pOH, and the ion product constant of water (Kw) to calculate the concentration of hydroxide ions ([OH-]) in the solution:
[tex]Kw = [H+][OH-] = 1.0 \times 10^{-14} M^2\\[OH-] = Kw / [H+] = (1.0 \times 10^{-14}) / (0.0045) ≈ 2.22 \times 10^{-12} M[/tex]
Therefore, the pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately [tex]2.22 \times 10^{-12} M[/tex].
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the time it takes for the celestial sphere to rotate once relative to the earth is called
A sidereal day, and it is 23 hours, 56 minutes, and 4.09 seconds.
What is the seconds?Seconds are a unit of time that is equal to one sixtieth of a minute. It is represented by the symbol "s", and is one of the most commonly used units of time. Seconds are used to measure the duration of events, as well as the intervals between them. They are also used to measure the speed at which objects move or the rate of change of a physical or chemical process. Seconds are used in many scientific and technical fields, as well as everyday life.
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The time it takes for the celestial sphere to rotate once relative to the earth is called The sidereal day.
The sidereal day is the length of time it takes the Earth, in relation to the "fixed" stars, to complete one rotation around its axis. When we say that the stars are "fixed," we mean that we treat them as though they were fastened to a fictitious celestial sphere located a great distance from Earth.
What does the term synodic day mean?The foundation of solar time is the synodic day, which is the length of time it takes for a celestial object to revolve once in reference to the star it is circling.
The synodic day is the length of time it takes for a planet to complete one rotation around the object it is orbiting. The synodic day, or solar day, for Earth is roughly 24 hours long. Because the earth orbits the sun and the moon cycles through its phases at the same time, the synodic month is longer than the sidereal month.
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Which of the following statements about stars that produce similar spectral patterns is true?
a
The stars have about the same mass.
b
The stars are about the same size.
c
The stars are the same age.
d
The stars are made of similar elements.
The statement which is true about stars that produce similar spectral patterns is true that the stars have about the same size. Thus, the most valid option for this question is B.
What is meant by spectral patterns?Spectral patterns may be defined as a type of arrangement that can be utilized in order to identify the atoms, elements, or molecules present in a star, galaxy, or cloud of interstellar gas.
If we disintegrate the incoming rays of light from a celestial source with the help of a prism, we will very frequently observe a spectrum of colors that are passed with discrete lines. Stars of identical size, temperature, composition, appearance, and other attributes have similar spectra and are categorized into an identical and similar spectral classes.
Therefore, the statement which is true about stars that produce similar spectral patterns is true that the stars have about the same size. Thus, the most valid option for this question is B.
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a rightward shift in a demand curve and a rightward shift in a supply curve both result in a
A rightward shift in a demand curve and a rightward shift in a supply curve both influence the equilibrium quantity increases, but the equilibrium price may increase, decrease or remain unaffected, relying on the extent of shifts in the two curves.
A demand curve is a graph that indicates the relationship between the price of a good or service and the amount required within a specified time frame. Demand curves can be utilized to comprehend the price-quantity relationship for consumers in a respective market - grain or soybeans, for instance. On most supply curves, as the price of a good expands, the number of goods delivered also increases. Supply curves can frequently indicate if a commodity will encounter a price increase or decrease established on demand, and vice versa.
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A bus is moving at an average speed of 70 mph on the motorway. The journey takes 3 hours 30 minutes. How far did the bus travel?.
The bus travelled a total of 245 miles.
We can use the formula:
distance = time x speed
where:
Speed is measured in miles per hour (mph) or metres per second (m/s), and distance is measured in miles or meters.
Time is measured in terms of hours or seconds.
To calculate an object's speed, you must first know how far it has travelled and how long it took to travel that distance.
To calculate the distance that the bus travelled.
first we have to convert the time into hours.
3 hours and 30 minutes = 3.5 hours (since 30 minutes is half an hour).
Now we can use the formula:
distance = time x speed
245 miles = distance
= 70 mph x 3.5 hours
As a result, the bus travelled a total of 245 miles.
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When a boxer is moving away from a punch, the force experienced is reduced because:________
When a boxer is moving away from a punch, the force experienced is reduced because the impact time, or the duration of the impact, is increased.
Why the force is reduced?When an object is in motion and is suddenly subjected to a force, the magnitude of the force depends on both the strength of the force and the time over which it is applied. The longer the impact time, the lower the average force experienced by the object.
By moving away from the punch, the boxer effectively increases the impact time, spreading out the force of the punch over a longer period of time and reducing the average force experienced. This is similar to the idea of a "glancing blow," in which a moving object experiences a reduced force if it is only partially hit, as opposed to being hit head-on.
This is why boxers often move away from punches and try to dodge them, rather than trying to absorb them head-on. By reducing the force of the punch, they can avoid being knocked out or seriously injured, and can stay in the fight.
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choose all that apply. ccd cameras are better astronomical detectors than the human eye because
CCD cameras are better astronomical detectors than the human eye for several reasons: their quantum efficiency is higher, they can observe at wavelengths beyond the visible and the integration time can be longer.
First, their quantum efficiency is higher, meaning they are able to detect a larger percentage of the photons that enter the camera. Second, they can observe at wavelengths beyond the visible, such as infrared and ultraviolet, which are not visible to the human eye. However, CCD cameras cannot turn photons into protons, as photons and protons are two different types of particles. Finally, the integration time of a CCD camera can be longer than the exposure time of the human eye, allowing for more photons to be detected and resulting in a better signal-to-noise ratio in the final image.
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Choose all that apply. CCD cameras are better astronomical detectors than the human eye because
Choose one or more:
A. their quantum efficiency is higher.
B. they can observe at wavelengths beyond the visible.
C. they can turn photons into protons.
D. the integration time can be longer.
In The Figure Above, Find The Equivalent Capacitance Of The Combination. Assume That C1 = 15.0 ΜF, C2 = 5.00 ΜF, And C3 = 4.00 ΜF.uploaded imageIn the figure above, find the equivalent capacitance of the combination. Assume that C1 = 15.0 µF, C2 = 5.00 µF, and C3 = 4.00 µF.
To find the equivalent capacitance of the combination, we can use the formula for capacitance in a series circuit and a parallel circuit.
How to find equivalent capacitance?let's find the capacitance of the two capacitors C2 and C3 in parallel. The capacitance in parallel is given by:
C23 = C2 + C3 = 5.00 µF + 4.00 µF = 9.00 µF
Next, let's find the capacitance of the capacitors C1 and C23 in series. The capacitance in series is given by:
1/C123 = 1/C1 + 1/C23
Substituting the values, we get:
1/C123 = 1/15.0 µF + 1/9.00 µF
Simplifying, we get:
1/C123 = (3/45 + 5/45) µF^-1 = 8/45 µF^-1
Therefore, the capacitance of the combination is:
C123 = 45/8 µF = 5.625 µF
So the equivalent capacitance of the combination is 5.625 µF.
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what is the temperature in the mesa?
Mesa temperature is 65°F with a partly overcast sky and a SE wind speed of 5 to 10 mph according to the weather forecast.
The weather in Mesa, Arizona, in February. Daily high temperatures seldom drop below 59°F or rise over 82°F, rising by 5°F from 68°F to 73°F. Daily lows rise by 4°F, from 45 to 49, seldom dropping below 37 or rising beyond 56.
In Phoenix, most days in February reach temperatures of exceeding 60 °F (16 °C). This month, the city has seen temperatures in the 80s °F (above 27 °C) on an average of 4 days. Nonetheless, the temperature seldom rises beyond 90 °F (32 °C). On average, there are two evenings each week when the temperature drops to or below 40 °F (4 °C).
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People have been using tools to clean their teeth for thousands of years. The ancient Babylonians used chewing sticks and the Romans used toothpicks until the Chinese first invented the toothbrush in the 1600s.
How do all of these forms of dental technology improve people’s lives?
A.
Having clean teeth prevents you from getting diseases such as the flu and cholera.
B.
People with healthy teeth and gums are wealthier than people with cavities.
C.
Healthy teeth and gums are important for our intake of nutrition.
D.
People who have dental disease are not allowed to hold certain jobs.
Having clean teeth prevents you from getting diseases such as the flu and cholera. Therefore, the correct option is option A.
What is tooth?The study the tooth structure is the focus of the anatomical discipline known as dental anatomy. Dental occlusion, or the contact between teeth, is not included in its field of study, but rather the development, appearance, as well as categorization of teeth are.
Because it deals with naming teeth and their structures, dental anatomy also serves as a taxonomic science. Having clean teeth prevents you from getting diseases such as the flu and cholera.
Therefore, the correct option is option A.
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he Himalaya Mountains are a range of mountains that is
2,400 km long and that arcs across Pakistan, India, Tibet, Nepal, Sikkim, and Bhutan. The Himalaya Mountains are the highest
mountains on Earth. Nine mountains, including Mount Everest, the highest mountain on Earth, rise to heights of more than 8,000 m. Mount Everest stands 8,850 m tall.
The formation of the Himalaya Mountains began around 80 million years ago. A tectonic plate carrying the Indian subcontinent collided with the Eurasian plate. In the process, the Indian plate was driven beneath the Eurasian plate. This collision caused the uplift of the Eurasian plate and the subsequent formation of the Himalaya Mountains. This process is ongoing today as the Indian plate continues to push under the Eurasian plate. New measurements show that Mount Everest is moving northeast by as much as 10 cm per year.
Part A What type of boundary is being described in the passage, and what two plates are involved?
Part B Describe the geologic process that led to the formation of the Himalaya Mountains.
Answer:
Part A: The boundary being described in the passage is a convergent boundary, where two tectonic plates are colliding. The two plates involved are the Indian plate and the Eurasian plate.
Part B: The geologic process that led to the formation of the Himalaya Mountains began around 80 million years ago when the Indian subcontinent collided with the Eurasian plate. The Indian plate was driven beneath the Eurasian plate, causing the uplift of the Eurasian plate and the subsequent formation of the Himalaya Mountains. This collision continues today, as the Indian plate continues to push under the Eurasian plate, causing the mountains to continue to rise. The process of one plate being driven beneath another is called subduction, and it is a common process that forms mountain ranges around the world.
Kartianna is pushing a lawn mower using a force of 300 n. If she pushes the mower a distance of 800 m, how much work has she done?.
Kartianna has thus performed 240,000 joules of work while pushing the lawn mower.
Kartianna's work can be calculated using the following formula:
work = force multiplied by distance multiplied by cos (theta)
where:
The amount of force applied is measured in newtons (N), and the distance over which the force is applied is measured in meters (m)theta is the angle formed by the force and displacement vectors (if the force is applied at an angle to the direction of motion).We can assume that Kartianna is pushing the lawn mower in a straight line in this case, so the angle theta between the force and displacement is 0 degrees, and the cosine of 0 degrees is 1.We can assume that Kartianna is pushing the lawn mower in a straight line in this case, so the angle theta between the force and displacement is 0 degrees, and the cosine of 0 degrees is 1.
As a result, Kartianna's total amount of work is:
work = force multiplied by distance multiplied by cos (theta)
300 N x 800 m x cos work (0)
240,000 joules = work (J)
Kartianna has thus performed 240,000 joules of work while pushing the lawn mower.
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Find the value of M
Please hurry
The mass M is 150 Kg
How do we convert mass to weight?Weight is a measure of the force exerted on an object due to gravity, whereas mass is a measure of the amount of matter in an object. To convert mass to weight, you multiply the mass by the acceleration due to gravity. The formula for converting mass to weight is:
Weight = mass * acceleration due to gravity
The acceleration due to gravity is 10 m/s^2 on the surface of the Earth.
Mass = 1500 N/10 m/s^2
= 150 Kg
Thus the mass of the object can be obtained as 150 Kg
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What are most asteroids made of ?
Asteroids are made up of rock. The most common constituents are clay and silicate. It usually have some metals like nickel or iron in them.
Asteroids are also known as mini planets. They are rocky remnants left over 4.6 billion of years, formed during the formation of solar system. Currently there are 1,266,744 known asteroids in the solar system. Most of them are found in the asteroid belt between Mars and Jupiter.
The composition of asteroids are determined by its distance from the sun. Ones that are nearer to sun have mainly carbon in them. It also have trace amounts of nitrogen, hydrogen and oxygen. The farther the asteroids, the constituent is rocky silicates. Some metallic asteroids are made up of 80% of iron, 20% of elements like nickel, palladium, platinum, gold, osmium, ruthenium and rhodium.
So most of the asteroids are made up of silicate, carbon and metals like iron.
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A jet plane is speeding down the runway during takeoff. Air resistance is not negligible. Disregard the friction forcee acting on the wheels.
If air resistance is not negligible, it will act as a resistive force against the motion of the jet plane.
What is air resistance ?The air resistance will rise as the plane gains speed and finally reach a point where it is equivalent to the forward thrust produced by the engines. The plane will then no longer accelerate because there will be no net force exerting any push on it.The plane must reach a high enough speed to produce enough lift from its wings to defy gravity in order to take off. The weight of the aircraft, the size and shape of the wings, and the density of the air are only a few of the variables that will affect the needed takeoff speed.The pilot must also take into account additional elements during takeoff, including as the wind's strength and direction, the length of the runway, and any potential impediments.To know more about air resistance , check out :
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what formula is used to find the theoretical moment of inertia for the disk?
The formula used to find the theoretical moment of inertia for a disk is: I = (1/2)MR^2, where I is the moment of inertia, M is the mass of the disk, and R is the radius of the disk.
This formula is derived from the definition of moment of inertia, which is the resistance of an object to rotational motion. For a disk, the mass is distributed evenly around the central axis, making it a perfect example of rotational symmetry.
Using calculus, we can determine that the moment of inertia is proportional to the mass and the square of the distance from the axis of rotation. This is where the (1/2)MR^2 term comes from in the formula. By using this formula, we can calculate the theoretical moment of inertia for any disk given its mass and radius.
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what scientific applications can spectrophotometry be used for?
Spectrophotometry applications can be used to: measure the absorbance, reflectance and transmission of light by gases, liquids, and solids.
What is spectrophotometry?Branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength is called spectrophotometry.
Spectrophotometry is the quantitative measurement of the interaction of ultraviolet, visible, and infrared radiation with the material and has a impact on a wide field of science and technology.
Spectrophotometry is a method to measure how much chemical substance absorbs light by measuring the intensity of light as beam of light passes through sample solution.
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A plane needs to reach a velocity of 250 kilometers per hour to take off and leave the runway. If the wind is blowing in the direction of takeoff at a velocity of 20 kilometers per hour, what velocity must the plane reach in order to take off?.
The velocity that the plane must have in order to takeoff is found to be 230km/h in the blowing wind.
The takeoff velocity of the plane that is required is 250km/h and leave the runway.
The wind is blowing in the direction that is also the direction of the takeoff of the plane and the speed of the plane is 20km/h.
Now, if U is the takeoff speed of plane and V is the speed of the wind, then the speed of the plane that will be adequate to take off in the presence of the wind is given by,
Required speed = U-V
Here, V is subtracted from U because both are in same direction but they would have been added if they were in opposite direction.
Required relative velocity = (250-20)km/h
Required relative velocity = 230km/h.
So, the velocity required of the plane for the tale off is 230km/h.
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A bicyclist is finishing her repair of a flat tire when a friend rides by with a constant speed of 4.8 m/s. Two seconds later the bicyclist hops on her bike and accelerates at 2.2 m/s2 until she catches up with her friend.
A. How much time, counting from the moment she hops on her bike, does it take until she catches up?
B. How far does she travel in this time?
Answer:
Explanation:
(4.8 m/s)t = 1/2(2.2 m/s²)t²
2(4.8 m/s)t / (2.2 m/s²) = t²
2(4.8 m/s) / (2.2 m/s²) = t²/t
t = 4.36 s
A. total time it takes to catch up to friend = 4.36s + 2s = 6.36s (took her 2 sec to hop on the bike and get going)
B. Distance she travels is the same distance the friend travels in 4.36 s = (4.8 m/s)(4.36 s) = 1/2(2.2 m/s²)(4.36 s)² = 20.9 m
Base your answers to following questions, 1-6 on the information below.
Tiger Woods is standing at the tee after his knee surgery and can't wait to take out the driver and hit the golf ball down the fairway with a little slice (because of the dog leg right). If he hits the golf ball at
an angle of 30 degrees with the horizontal and a velocity of 196 m/s, find the following
1. The initial vertical component of the velocity is:
2. The initial horizontal component of the velocity is:
3. When the golf ball reaches a maximum height, the vertical component of the velocity is:
4. The time of the flight of the golf ball is:
5. The maximum height of the golf ball is:
6. The horizontal range of the golf ball is:
Answer: hghj
Explanation:
fygvbufvtdcrsxeasxtrydtcufyvigubohljnk