The efficiency of a bulb can be calculated as the ratio of the useful energy output (in this case, the light energy) to the total energy input. In this scenario, the useful energy output is 500 J - 350 J = 150 J, and the total energy input is 500 J. So, the efficiency can be calculated as:
Efficiency = (useful energy output) / (total energy input) = (150 J) / (500 J) = 0.3 or 30%.
This means that 30% of the energy input was converted into useful light energy, while 70% was converted into heat. This is the efficiency of the bulb.
4 more to go you got this
answer:
Lol DIY
explanation
Just DIY
Rank the following in order of decreasing wavelength
1.infrared radiation 2 radio waves 3 ultraviolet light 4 visible light gamma rays
The electromagnetic spectrum is arranged in the order of increasing frequency. The decreasing order of wavelength of the radiations is radio radio waves, infrared, visible light, uv rays and gamma rays.
What is electromagnetic spectrum ?The electromagnetic spectrum is the arrangement of waves in the order increasing frequency or decreasing wavelength. The order of the spectra starts from radio waves, microwaves, infrared, visible light, ultraviolet, x -rays and gamma rays.
The visible light that we can see is in between IR and UV rays. Hence, visible light has a frequency greater than IR rays but shorter than IR. Similarly visible light is longer than UV- rays but less frequency than UV rays.
Gamma rays are the most energetic and shorter waves in the electromagnetic spectrum with smaller wavelength and greater frequency. Hence, the order of decreasing wavelength is 2, 1, 4, 3, 5.
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A bear walks 10 km west in two hours in search of fresh berries. She then walks 3. 5 km east in one hour. What is her average velocity?.
In two hours, a bear travels ten kilometers west in quest of more fruit. Then, in an hour, she covers 3. 5 km to the east. The typical Average velocity is 3.25 km/hr .
The change in position or displacement (x) divided by the time intervals (t) during which the displacement happens is the definition of average velocity. Based on the direction of the displacement, the average velocity might either be positive or negative.
The formula V = D/t is used to compute average velocity, where V stands for average velocity, D for total displacement, and t for total time. The displacement of an object over time is its average velocity. We divide the distance traveled by the amount of time to determine an object's average speed. We are aware that speed is a vector.
here d = 10 km
t = 2hours
distance at second time (z) = 3.5 km
Average velocity = ∆x/∆t
Average velocity = (10-3.5) / 2
Average velocity = 3.25 km/hr
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Based on what you learned about light, select all of the correct statements from the following list. -High frequency photons carry more energy than long wavelength photons.
-All electromagnetic waves travel at the speed of light.
-Light can act both as a wave and a particle.
-A photon is a particle of light. X-rays and gamma rays are long wavelength photons.
-Different types of electromagnetic radiation are fundamentally different types of waves.
-The only type of electromagnetic radiation that is actually considered light is visible light.
The correct statements include:
High frequency photons carry more energy than long wavelength photons.All electromagnetic waves travel at the speed of light.Light can act both as a wave and a particle.A photon is a particle of light.option A, B, C, D
What are the incorrect statements about electromagnetic waves?
The Incorrect statements include:
Different types of electromagnetic radiation are fundamentally different types of waves. (All types of electromagnetic radiation are fundamentally the same type of wave but have different frequencies and wavelengths.)
The only type of electromagnetic radiation that is actually considered light is visible light. (All types of electromagnetic radiation are considered light, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.)
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Answer: A B C D
Explanation: k12 I had this quiz
the common 9 volt battery imparts how much energy to one coulomb of charge?
9 joules of energy in one coulomb of charge.
The energy of the battery means the amount of energy given by the battery.
The energy that a battery imparts to a charge can be calculated using the formula:
E = V * Q
where,
E is the energy in joules, '
V is the voltage in volts, and
Q is the charge in coulombs.
For a 9 volt battery, the energy imparted to one coulomb of charge can be calculated as:
E = 9 V * 1 C
E = 9 J/C
One joule per coulomb is equal to one volt.
Hence,
9 J/C = 9 V
9 volt battery, the energy imparted to one coulomb of charge is 9 V.
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how to calculate vector projection?
Vector projection calculated by multiplying the magnitude of the two vectors by the cosecant of the angle between them.
Vector projection is a technique used in mathematics and physics to determine the component of a vector that lies in a specific direction. Given two vectors, the vector projection of one vector onto the other represents the length of the component of the first vector that lies in the direction of the second vector. The vector projection is calculated by taking the dot product of the two vectors and dividing them by the magnitude of the second vector.
The resulting value is then multiplied by the unit vector of the second vector to obtain the vector projection. Vector projection is useful in a variety of applications, including physics, engineering, and computer graphics. In physics, vector projection is used to determine the component of a force that acts in a specific direction. In engineering, vector projection is used in structural analysis to determine the forces acting on a structure. In computer graphics, vector projection is used to simulate the effects of lighting and shading on three-dimensional objects.
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18. After chemical weathering, what is true about the chemical makeup of the weathered rock?
A. It is different than that of the original rock.
B. It is the same as the original rock.
C. It is more affected by mechanical weathering.
D. It could either be changed or stay the same.
The true statement is about the chemical makeup of the weathered rock is "It is different than that of the original rock.
option A.
What is chemical weathering?Chemical weathering is a process that involves the breakdown of rocks and minerals through chemical reactions with the surrounding environment. This process occurs due to the interaction of rock minerals with water, atmospheric gases, and organic acids, which can lead to the breakdown of the mineral structure of the rock.
Chemical weathering involves the breakdown of rocks and minerals through chemical reactions with water, oxygen, and other substances in the environment. As a result of these reactions, the chemical makeup of the weathered rock can be altered, and it may have different physical and chemical properties than the original rock.
Therefore, option A is the correct answer.
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When a car goes around a corner at 20 mph, why do we say it accelerates?The car is accelerating because of the velocity is constantThe car accelerates because it's going 20 mphCars always accelerate when they are in motionThe car is accelerating because it's changing direction
When a car goes around a corner at 20 mph, (D) it is accelerating because it's changing direction. The direction of the velocity which is a vector is changing so the it accelerates.
What is acceleration?An acceleration is a rate of change in velocity of an object with respect to time. It can be expressed as
a = Δv/Δt
Where
a = accelerationΔv = change in velocityΔt = change in timeA car goes around a corner at 20 mph. Find the reason why it is accelerates!
We know that an object accelerates when it has a change in velocity. The magnitude of the velocity of the car doesn't change, but the direction does.
A velocity is a vector which has both magnitude and direction. While the direction of the car is changing around a corner, the velocity also changes. Hence, with a change in velocity, we say car is accelerating.
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which thermometer is used to measure surface temperatures?A. Surface probeB. Thermocouple with immersion probeC. Infrared thermometerD. Time-temperature indicator
The thermometer that is commonly used to measure surface temperatures is the infrared thermometer. This type of thermometer uses infrared radiation emitted by the surface to measure its temperature without requiring direct contact.
Infrared thermometers work by detecting the intensity of infrared radiation emitted by the surface and converting it into a temperature measurement. They are quick and easy to use, and they can measure the temperature of a surface from a safe distance without physically touching the surface.
Surface probes and thermocouples with immersion probes are typically used to measure the temperature of liquids, gases, and other materials that can be easily accessed. Time-temperature indicators are used to monitor the temperature of perishable goods during storage and transportation, but they are not typically used to measure surface temperatures.
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how to find rpm to rad s
RPM (revolutions per minute) is 31.42 radians per second
To convert from RPM (revolutions per minute) to rad/s (radians per second), you can use the following conversion formula:
rad/s = RPM x (2π/60)
where 2π represents the number of radians in a full circle, and 60 represents the number of seconds in a minute.
Revolutions Per Minute is the acronym for this term. It involves figuring out how frequently an object rotates, or how many revolutions or turns it makes each minute. It illustrated how frequently an involuntary component spins around its axis in a minute. RPM, then, is the frequency or speed of an involuntary object's rotation about a fixed axis, such as the crankshaft of an engine, a turbine power generator, a DVD or CD player, or a turbocharger.
Here's an example:
If you have an object rotating at 300 RPM, you can find its angular velocity in radians per second as follows:
rad/s = 300 x (2π/60) = 31.42 rad/s
The angular velocity of the object is 31.42 radians per second.
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which of these is the largest continuous sand desert in the world?
The largest continuous sand desert in the world is the Sahara Desert, located in Northern Africa.
The largest continuous sand desert in the world is the Sahara Desert, located in Northern Africa. It covers an area of about 3.6 million square miles (9.4 million square kilometers) and spans over 11 countries including Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Sudan, Tunisia, and Western Sahara.
The Sahara Desert is also the hottest desert in the world, with temperatures reaching over 130°F (54°C) in some areas. It is home to a diverse range of flora and fauna, including many species that have adapted to the harsh desert environment.
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however, they did not measure stellar parallaxâthe stars did not appear to move back and forth at all over the course of a year. what is the most likely reason for this apparent lack of motion?
The lack of apparent motion of the stars is due to the vast distances involved, and not to any shortcomings in the observation techniques or instruments used such as stellar parallax.
What is Stellar Parallax?Stellar parallax is the apparent shift in the position of a nearby star relative to more distant background stars as observed from Earth, caused by the Earth's orbit around the sun. In other words, as the Earth moves in its orbit around the sun, the perspective from which we view nearby stars changes, causing those stars to appear to move slightly against the more distant background stars.
The amount of this apparent shift is directly proportional to the distance of the star from the Earth. The closer the star, the greater the parallax. By measuring the parallax of a star, astronomers can determine its distance from the Earth with a high degree of accuracy.
Stellar parallax provides one of the most direct and reliable methods for determining the distances to nearby stars and is a key tool in the study of the structure and evolution of the Milky Way galaxy and the universe as a whole.
The most likely reason for the apparent lack of motion of the stars is due to the great distances between Earth and the stars. Stellar parallax is the apparent shift in the position of a star as observed from two different points in Earth's orbit, such as from opposite sides of the Earth's orbit around the sun. This apparent shift is caused by the change in the observer's perspective as the Earth moves.
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Two balloons of different mass hang from strings near each other. You charge them about the same amount by rubbing each balloon with wool.
Part B: Compare the angles of the threads with the vertical. Mass 1 Angle is 57. Mass 2 Angle is 122.
If m1 = m2, then Ï1 < Ï2
If m1 < m2, then Ï1 <Ï2
If m1 < m2, then Ï1 = Ï2
If m1 > m2, then Ï1 < Ï2
If m1 < m2, then Ï1 < Ï2
What will be the angles of the threads with the vertical. Mass 1 Angle is 57?
The angle between the thread and the vertical (Ï) is determined by the ratio of the weight of the balloon to the electrostatic force on the balloon, which is proportional to the amount of charge on the balloon.
If two balloons have different masses but are charged to the same amount, the heavier balloon will experience a larger gravitational force, and the angle between its thread and the vertical will be smaller. In this case, if m1 < m2, then Ï1 < Ï2.
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the time it takes for the celestial sphere to rotate once relative to the earth is called
The time it takes for the celestial sphere to rotate once relative to the earth is called synodic day.
What is meant by synodic day?Synodic day or synodic rotation period is the period for a celestial object to rotate once in relation to the star it is orbiting which is the basis of solar time.
Synodic day is the period it takes for planet to rotate once in relation to body it is orbiting. For Earth, synodic day is known as a solar day, and it is about 24 hours long. Reason that the synodic month is longer than the sidereal month is because the earth orbits the sun at the same time that the moon goes through its phases.
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the lowest note on a grand piano has a frequency of 27.5 hz . the entire string is 2.00 m long and has a mass of 400 g . the vibrating section of the string is 1.90 m long.
To tune this string properly, 357.21 N force of tension is required.
What is a simple definition of frequency?Frequency is the number of waves that pass a specific area in a defined amount of time. As a result, the frequency is 2 per second if a wave travels through in half a second. If it takes 1/100 of an hour, the frequency is 100 times per hour.
To calculate the tension needed to tune the string,
we can use the formula:
Tension = (frequency × wavelength)² × mass / (4 ×length) where:
frequency is the lowest note frequency, which is 27.5 Hz
wavelength is the length of the vibrating section, which is 1.90 m
mass is the mass of the string, which is 400 g (or 0.4 kg)
length is the total length of the string, which is 2.00 m
When the values are added to the formula, we obtain: Tension = (27.5 Hz × 1.90 m)² × 0.4 kg / (4 × 2.00 m)
= 357.21 N
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Question:
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 400 g. The vibrating section of the string is 1.90 m long. What tension is needed to tune this string properly?
Explain the relationship between the tracking ability of a solar pv system and its energy production.
Trackers can growth a PV system's production via up to 40% greater than a fixed-tilt array by using retaining consistent direct daylight exposure to the module. The range of the project and the form of tracker determine the quantity of productivity development over a fixed gadget.
A PV (photovoltaic) system is a type of renewable energy system that converts sunlight into electricity using solar panels. The solar panels are typically made of silicon cells that absorb the energy from the sun and convert it into direct current (DC) electricity. This DC electricity is then converted into alternating current (AC) electricity using an inverter, which can be used to power homes, businesses, and other electrical devices.
PV systems can be designed to be grid-tied, off-grid, or hybrid. Grid-tied systems are connected to the utility grid and allow excess electricity to be sold back to the utility company. Off-grid systems are independent of the utility grid and use battery storage to provide electricity when the sun is not shining. Hybrid systems combine both grid-tied and off-grid components to provide reliable power even in the event of a power outage.
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Complete Question: -
Explain the relationship between the tracking ability of a solar PV system and its energy production. Simulated energy production for one kilowatt of solar PV capacity in Los Angeles, Calif. hourly average production by season, watthours
800
700
600
500
400
300
200
100
0
4 8 12 16 20 p 4 8 12 16 20 4 8 12 16 20
winter
summer
spring
(Mar-May)
(Dec-Feb)
(Jun-Aug)
Adnun
PV array facing south at fixed tilt
4 8 12 16 20
fall
(Sep-Nov)
Aion Axis of rotation
2
One axis tracking PV array
with axis oriented south.
tracking.
dual-axis
tracking.
single-axis
afted south
no tracking.
sited south
no tracking.
fat
Axis of rotation
Two-axis tracking PV array
ela
What is 106 °F in °C?
106 °F is equivalent to 41.11 °C
Temperature conversion from Fahrenheit to Celsius is done using the formula °C = (°F - 32) × 5/9. In this case, we can plug in the given temperature of 106 °F and solve for °C.
Here is the step-by-step process:
1. Subtract 32 from the Fahrenheit temperature: 106 - 32 = 74
2. Multiply the result by 5: 74 × 5 = 370
3. Divide the result by 9: 370 ÷ 9 = 41.11
Therefore, 106 °F is equivalent to 41.11 °C.
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By what amount does the sound intensity decrease when the distance to the source triples?.
The sound intensity, or sound power, decreases by a factor of nine (9) when the distance to the source triples.
What is sound intensity?Sound intensity is the rate of energy transfer per unit area and per unit time in the form of sound waves. It can be measured in units of watts per square meter (W/m2). Sound intensity is proportional to the square of the sound pressure level and is inversely proportional to the distance from the source. Sound intensity decreases with increasing distance from the source and increases with the sound pressure level.
This is due to the inverse-square law, which states that the sound intensity decreases inversely proportional to the square of the distance from the source. This means that as the distance from the source increases, the sound intensity decreases by the square of that distance. In this case, when the distance is tripled, the sound intensity decreases by a factor of nine (9).
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I’m not sure between A or B, can someone pls help me out?
Answer:
Its the Answer A.
Explanation:
makes the most sense
what optional wires-x connection cable kit is available for the yaesu ftm-300dr?
The Yaesu FTM-300DR's optional wires-X connection cable kit is the SCU-39. The cables and adapters needed to use the wires-X digital communication mode and link the transceiver to a PC are included in this kit.
WIRES-X Yaesu : What is it?WIRES-X. An Internet communication system called WIRES (Wide-coverage Internet Repeater Enhancement System) increases the range of amateur radio communication. In WIRES-X, the wireless communication is connected to the Internet through the use of an amateur node station acting as an access point.
What will WIRES-X require of me?Requires a transceiver with the Yaesu C4FM Portable Digital Node capability (FT5D, FT3D, FT2D, FTM-400XD, FTM-300D, FTM-200D, FTM-100D: as of 8/2021 or Firmware update, FTM-400D: Requires Firmware update), a USB connection cable, and a computer with the WIRES-X software and WIRES-X.
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what happens to the temperature of the gas during an isobaric expansion?
With an increase in gas volume, the gas's temperature must also rise. Temperature and volume changes result in work and an internal energy shift.
An illustration of an isobaric processBoiling water into steam or freezing water into ice are two examples of isobaric processes. A gas either expands or contracts during the process to maintain constant pressure, and as a result, the net work done by the system or on the system is determined.
What does "isobaric vs. adiabatic" mean?An adiabatic process where no heat is added to or removed from the system. an isobaric process, in which there is no change in the pressure of the system. the system's volume remains constant throughout an isochoric process.
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A uniform electric field of magnitude 47.6N/C is parallel to the x axis. A circular loop of radius 17.7cm is centered at the origin with the normal to the loop pointing 67.9∘ above the x axis.
Part (a) Calculate the electric flux in, newton squared meters per coulomb, through the loop.
Φ = N⋅m2/C
Part (b) To what angle, in degrees from the positive x axis, should the normal of the loop be rotated so that the flux through the loop becomes 0.304N⋅m2/C?
θ′ =∘
The electric flux that flows through the loop is 4.27 Nm²/C, and the loop's normal ought to be rotated by about 39.5 degrees.
Flux electric: Which is it?Electric flux is a characteristic of an electric field and refers to the number of electric field lines that cross a specific area. Electric field lines, according to this theory, begin with positive electric charges and end with negative electric charges.
Part a: The following formula must be used to determine the electric flux through the loop:
= E A cos() Since the electric field is parallel to the x-axis and the loop is circular, the area of the loop can be calculated as follows:
By substituting the given values for A = r², we obtain:
A = (0.177m)² = 0.0985 m² = 67.9° = 1.184 radians = (47.6 N/C) (0.0985 m²) cos(1.184) 4.27 Nm²/C Part (b) In order to determine the angle at which the flux through the loop becomes 0.304 Nm²/C, we can rewrite the equation for electric flux to account for:
= cos(-1)(/(EA))) By substituting the values provided, we obtain:
= cos(-1)(0.304 Nm²/C / (47.6 N/C 0.0985 m²)) = 39.5°; consequently, the loop's normal should be rotated by approximately 39.5°.
What does electric flux mean?electric flux is a property of an electric field that can be described as the number of electric lines of force—also known as electric field lines—that cross a specific area. Electric field lines are thought to start with positive electric charges and end with negative electric charges.
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What is the distance between the points (5, 14) and (18, 3)? clear check 6. 9 units 17. 03 units 28. 6 units 290 units.
The distance between the points (5, 14) and (18, 3) is 17.03 units
To find: PQ=?distance between two points = [tex]\sqrt{(x2-x1)^{2} +( y2-y1)^{2} }[/tex]
PQ = [tex]\sqrt{(18-5)^{2} +( 3-14)^{2} }[/tex]
PQ = 17.03 units
How do I find the distance between 2 points?
Discover the distance formula, a Pythagorean theorem application, to determine the separation between two places. To get the separation between any two points, we may rewrite the Pythagorean theorem as d=((x 2-x 1)2+(y 2-y 1)2).
Hence 17.03 units is a correct answer.
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Calculate the force that was used if a box was moved 15 meters with 85 Joules of work done
on it.
(Show work please)
The force requires to displace the object by 15 meters will be 5.67 N.
What is work?Work is defined as the energy transferred to or from an object by applying force along a displacement. In its most basic form, work equals the product of force strength and distance travelled for a constant force aligned with the direction of motion.
Given that the object is displaced by 15 meters and the work done is 85 Joules.
The force will be calculated as:
Work = Force x Displacement
Force = Work / Displacement
Force = 85 / 15
Force = 5.67 N
Therefore, the force will be 5.67 N.
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What's the AP physics 2 equation sheet?
The AP physics 2 equation sheet is a reference sheet that contains all of the important equations and formulas that are commonly used in the AP physics 2 exam. It is provided to students during the exam, and they are allowed to use it as a reference while answering questions.
The equation sheet includes equations for topics such as electric force, electric potential, electric field, magnetic force, magnetic field, optics, and thermodynamics. It also includes important constants, such as the speed of light and the charge of an electron.
The equation sheet can be found on the College Board website, and it is recommended that students become familiar with it before taking the exam. This will help them to quickly find the equations they need and to use them effectively during the exam.
In conclusion, the AP physics 2 equation sheet is an important resource for students taking the AP physics 2 exam. It contains all of the important equations and formulas that students need to know, and it is provided to them during the exam to use as a reference.
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Why does the indicator change color in acid-base titration?
The indicators have a chemical structure that can absorb light( have a color) under certain pH conditions and either change color or come tintless under other pH conditions.
This typically occurs due to a change in protonation of the functional group( special side chain) of the patch. Let's look at an illustration of thymol blue index, C27H30O5S. In the figure, there are three structural comformations that differ in two locales( indicated in red) as to whether there's a bound hydrogen or not. The presence of the hydrogens change the wavelength( s) at which the emulsion absorbs light, so there are different colors associated with each conformation. Each conformation also exists within a given pH range, meaning they change color at a specific pH range or point.
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If the electric force between two equally charged objects is 190 N when they are separated by a distance of 1,540 m,
what is the charge on each object?
Round answers to three decimal places
Upon rounding to three decimal places, the charge on each object is approximately 0.000004039 C.
What is Coulomb's constant?Coulomb's constant, denoted by k, is a proportionality constant that appears in Coulomb's law, which describes the electrostatic force between two electrically charged particles. The value of Coulomb's constant in a vacuum is approximately 8.98755 x 10⁹ N·m²/C².
The electric force between two charged objects is given by Coulomb's law:
F = k × (q1 × q2) / r²
where F is the electric force, q1 and q2 are the charges on the two objects, r is the distance between them, and k is Coulomb's constant, which has a value of 8.98755 × 10⁹ N·m²/C².
In this case, we have:
F = 190 N
r = 1,540 m
k = 8.98755 × 10⁹ N·m²/C²
q1 = q2 (since the objects are equally charged)
We can rearrange Coulomb's law to solve for the charge on each object:
q = sqrt(F × r² / k)
Substituting the given values, we get:
q = sqrt(190 N × (1,540 m)² / (8.98755 × 10⁹ N·m²/C²))
q ≈ 4.039 × 10⁻⁶ C.
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What type of evidence does cosmic background radiation provide about the origins of the universe?.
It is confirmed by the origins of the cosmos that the early universe was once quite hot.
What kinds of things emit radiation?Radiation is the term used to describe energy that a source emits. Sunlight or heat from the sun, radiofrequency from an oven, X rays from an X-ray tube, and gamma rays from radioactive materials are a few examples.
The source of radiationIt can be created artificially or it can come from unstable atoms that decay radioactively. Energy waves or charged particles are the two ways that radiation leaves its source. There are various types of radiation, and each one has unique characteristics and effects.
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What is amplitude
a measure of?
Answer:
Height
Explanation:
Amplitude is the height of a wave above the x-axis.
Claire flips a coin 4 times. Using the table, what is the probability that the coin will show tails at most once? a 2-column table with 5 rows. Column 1 is labeled number of tails with entries 0, 1, 2, 3, 4. Column 2 is labeled probability with entries 0. 06, 0. 25, 0. 38, 0. 25, 0. 6. 0. 06 0. 25 0. 31 0. 69.
The probability that the coin will show tails at most once is 0.31.
What is the probability ?The probability of any particular outcome is the measure of the likelihood that the outcome will occur. It is usually expressed as a number between 0 and 1 (where 0 shows impossibility and 1 shows certainty). The higher the probability of an event, the more certain that the event will occur. Probability is quantified as a number between 0 and 1, where, loosely speaking, 0 indicates impossibility and 1 indicates certainty. The higher the probability of an event, the more likely it is that the event will occur.
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The probability that the coin will show tails at most once is 0.31.
What is the probability ?How likely a certain outcome is to occur is determined by its probability. Usually, it is indicated by a number between 0 and 1. (where 0 denotes impossible and 1 denotes certainty). The chance of an occurrence increases as its likelihood increases. A number between 0 and 1 is used to represent probability, with 0 generally denoting impossibility and 1 generally denoting certainty. The chance of an occurrence increases as its likelihood increases.
probability that the coin will show tails at most once = P(x = 0) + P(x = 1)
= 0. 06 + 0. 25
= 0.31
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