Answer:
8.87 m/s^2
Explanation:
Crane takes 2. 0 minutes to lift a load to the top of a building. The change in gravitati potential energy of the load is 720 kj. What is the useful power output of the crane?.
6kW is the useful power output of the crane.
Define power.
Energy consumption per second is measured as power. The amount of force necessary to create a unit displacement is another way to quantify power. Power, a scalar quantity, is represented by the letter P. For instance, a light bulb with 100 W of electricity will provide more light than one with 10 W.
The power in a circuit is measured using electrical power, which is given in watts. Electrical and mechanical-electrical techniques are used to measure electrical power in centrifugal pump applications. A watt, which represents power, is equivalent to one joule every second.
Power = Work done /Time taken
Time = 2 minutes = 120 seconds.
Work = 720kJ = 720000J
Power = 720000/120 = 6000W
P = 6kW
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what type of weather do cold fronts usually bring?
Cold fronts bring cooler weather, clearing skies and sharp change in wind direction.
What type of weather does cold fronts bring?In the winter, cold fronts bring cold spells and sometimes snow. In the spring or summer, in temperate latitudes, hail may fall along with the rain. If moisture is not sufficient, such as when the system has previously moved across the mountain barrier, then cold fronts can pass without cloudiness.
Cold front is generally associated with stormy weather. Cold front often brings intense weather changes such as thunderstorms whereas a warm front brings light rain or drizzle.
With cold front, cold air advances and displaces warm air as cold air is more dense than warm air.
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When you speak, your voice sounds 10 dB louder to someone standing directly in front of you than to someone at the same distance but directly behind you. What is the ratio of the intensity of your voice for someone in front of you to the intensity for someone behind you?
The ratio of the intensity of voice for someone standing in front of the person to the intensity for someone standing behind is 10:1
What is intensity ?Intensity is a physical quantity that measures the amount of energy that flows through a given area per unit of time. In the context of sound waves, intensity refers to the amount of energy carried by sound waves per unit of time and per unit of area. It is related to the amplitude (or height) of the sound waves, which determines how much the pressure varies in the medium through which the waves travel. The unit of intensity is watts per square meter (W/m^2). The intensity of sound waves is important in many applications, such as in measuring the loudness of sounds, determining safe exposure levels to noise, and designing acoustic systems.
The difference in the sound level in decibels (dB) between two positions can be calculated using the following formula:
ΔL = 10 log10(I2/I1)
where ΔL is the difference in dB, I1 is the intensity at the first position, and I2 is the intensity at the second position.
In this case, the sound level is 10 dB higher is known for someone standing directly in front than for someone at the same distance but directly behind you. Using this information to set up the following equation:
10 dB = 10 log10(I_front/I_back)
where I_front is the intensity of voice for someone standing in front and I_back is the intensity of voice for someone standing behind
We can simplify this equation by dividing both sides by 10:
1 dB = log10(I_front/I_back)
Now, raise both sides of the equation to the power of 10:
10^1 = I_front/I_back
Simplifying this expression
I_front/I_back = 10
So the ratio of the intensity of your voice for someone standing in front of you to the intensity for someone standing behind you is 10:1. In other words, your voice is 10 times louder for someone standing directly in front of you than for someone at the same distance but directly behind you.
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A ball is launched horizontally off a platform at 15 m/s. The ball takes 1 second to
hit the ground. The height of the platform is
m. The ball will
land
m. from the base of the platform.
Answer:
Below
Explanation:
The ball has one second to fall from its height and to travel horizontally at 15 m/s
Rate X Time = distance 15 m/s * 1 s = 15 meters from the platform .
df = do + vot + 1/2 a t^2
df = final position = o ft ( on the ground)
do = initial position = height
vo = original vertical velocity = 0
a = - 9.81 ms^2
so you have this:
0 = height + 1/2 (- 9.81) m/s^2 * (1)^2
height = 4.9 meters
A radar gun was used to record the speed of a runner during the first 5 seconds of a race (see table). Use simpson's rule to estimate the distance the runner covered during those 5 seconds.
The distance covered by the runner in 5 seconds can be estimated to be 108 meters, using Simpson's rule.
What is distance?Distance is a measure of the amount of space between two objects or points. It can be measured in a variety of ways, including linear, angular, and temporal distance. Distance is an important concept in physics, mathematics, and other sciences. It is used to describe the magnitude of physical phenomena, such as the speed of light or the force of gravity. It can also be used to measure the distance between two points in space or between two points in time. Distance is also used in everyday life to describe the amount of separation between two people or locations.
Simpson's rule is a numerical integration method used to approximate the definite integral of a function. It is based on the idea that the integral of a function can be approximated by dividing it into a series of trapezoids and evaluating the area of each trapezoid. To use Simpson's rule to calculate the distance covered by a runner in 5 seconds, we need to calculate the area under the curve of the speed-time graph.
The first step is to calculate the area of the trapezoids. We can do this by taking the average of the two endpoints of each trapezoid and multiplying it by the width of the trapezoid. The width of each trapezoid is the difference between the x-values of the two endpoints. The area of each trapezoid can be calculated using the following formula:
Area = (Average of the two endpoints) × (width of the trapezoid)
Once the area of each trapezoid is calculated, we can add them all together to get the total area under the curve. This total area is the distance covered by the runner in 5 seconds.
For example, using the data from the table, we can calculate the area of the first trapezoid as follows:
Area = (8 + 10)/2 × (1) = 9
The total area under the curve is then calculated by adding the areas of all the trapezoids together:
Total area = 9 + 18 + 24 + 27 + 30 = 108
Therefore, the distance covered by the runner in 5 seconds can be estimated to be 108 meters, using Simpson's rule.
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An electron traveling horizontally enters a region where a uniform electric field is directed upward. What is the direction of the force exerted on the electron once it has entered the field?.
It moves downward. An electron moving horizontally passes between two horizontal plates, the upper charged negatively, the lower positively. A uniform, upward-directed electric field exist in the region between the plates, and this field exert an electric force downward on the electron.
What is an electron?Electrons are involved in gravitational, electromagnetic, and weak interactions, as well as many other physical phenomena, including electricity, magnetism, chemistry, and thermal conductivity.
Since an electron has charge, it has an electric field surrounding it. If the electron is moving in relation to the observer, the observer will track the electron and produce a magnetic field.
According to the Lorentz force law, an electron's velocity will be impacted by electromagnetic fields created by external sources.
When accelerated, electrons emit or take in energy in the form of photons.
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Can someone help with questions 1&2 please
1. After 10 iterations, we would have:
f^10(1) = 2^10•1 = 1024
2. The value of f^n(-1) will become more and more negative without bound.
How did we arrive at this assertion?1. As the number of iterations grows, the numbers will grow at an exponential rate. Specifically, each iteration doubles the value of the previous iteration. So after 10 iterations, we would have:
f^10(1) = 2^10•1 = 1024
2. If we repeat the process with an initial value of -1, we get:
• f(-1) = 2•(-1) = -2
• f²(-1) = 2•(-2) = -4
• f³(-1) = 2•(-4) = -8
We can see that the numbers are becoming increasingly negative as the iterations progress. In fact, we can prove that the function will approach negative infinity as the number of iterations grows. To see this, we can use the formula for the nth iteration of f:
f^n(-1) = 2^n•(-1)
As n gets larger and larger, 2^n grows at an exponential rate, while (-1) remains constant. Since the exponential growth dominates, the value of f^n(-1) will become more and more negative without bound.
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What are the 12 parts of microscope and their functions?
The 12 parts of a microscope and their functions are: eyepiece, objective lens, stage, condenser lens, diaphragm, fine focus knob, coarse focus knob, arm, base, illuminator, nosepiece, and stage clips.
The eyepiece is where the user looks through to observe the specimen. The objective lens provides magnification of the specimen. The stage is where the specimen is placed for observation. The condenser lens focuses light onto the specimen. The diaphragm controls the amount of light that reaches the specimen. The fine focus knob fine-tunes the focus of the image.
The coarse focus knob adjusts the focus of the image roughly. The arm provides support for the microscope. The base provides a stable platform for the microscope. The illuminator provides light to the microscope. The nosepiece holds the objective lenses in place. The stage clips hold the slide in place on the stage. Together, these 12 parts work together to allow the user to observe and study microscopic specimens in detail.
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the largest types of clouds found in interstellar space are
The largest types of clouds found in the interstellar space is called Molecular clouds. It mostly composed of molecular hydrogen and dust.
Molecular clouds are also known as dark nebula, which is massive interstellar clump or cloud. It is completely opaque due to the presence of dust and are usually visualized as dark patches between bright galaxies. These molecular clouds are the birth place of stars.
These clouds have higher density because of the higher number of hydrogen molecules per cubic centimeters. Some is said to have more than 10⁵ H₂ molecules per cm³. These clouds are so large, even individual clouds are bigger than stars, and the whole clump may be so large that there will be 150 light years to travel across.
So the largest clouds in interstellar space are molecular clouds.
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A person yelling is a transformation of what energy
Answer: force
Explanation:
What is meant by impulse in physics?
Impulse in Physics is a term that is used to describe or quantify the effect of force acting over time to change the momentum of an object. It is represented by the symbol J and usually expressed in Newton-seconds or kg m/s.
Answer
0 $6
A Question 19 (1 point) Retake question
The local electric company charges $0.113 per kilowatt-hour (kWh). How much
would it cost to run a 2.00 kW hot tub for a year (8760 hours)?
units
$59
$850
$1980
A Question 21 (1 point) Retake question
As you add more devices to a parallel circuit, what happens to RT and IT?
Answer:
850$
Explanation:
thats the answer
If you are told that a 20 kilogram object is raised by 10 meters, you know that?
a. the force of gravity on the object is 20 kilograms.
b. the mass of the object is 20 kilograms
c. the force of gravity on the object is 10 meters.
d. the mass of the object is 10 meters.
e. the acceleration of the object is 200 kilogram-meters.
If you are told that a 20 kilogram object is raised by 10 meters then the mass of the object is 20 kilograms.
What is force of gravity?
Force of gravity is the attractive force between two objects that is due to their masses. It is what causes objects to fall to the ground when dropped and what keeps planets in their orbits. The strength of the gravitational force between two objects depends on their masses and the distance between them. The force of gravity is an inverse square law, meaning that if the distance between two objects is doubled, the force of gravity between them will be one-fourth of what it was originally.
The mass of an object is a measure of the amount of matter it contains and is not affected by changes in its position or location. Therefore, the mass of the object remains the same regardless of how high it is raised. In this case, the mass of the object is 20 kilograms.
Therefore, mass of the object is 20 kilograms is the correct answer.
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A set of three different wires were each subjected to a force by hanging a mass off of the bottom while the top remained fixed. The original lengths and new lengths of the wires are shown below. Case A B C O A, B, C O A, C, B Rank the strain on each of these wires from least to greatest. OB, A, C OB, C, A OC, A, B Lo (mm) 235 342 185 O C, B, A Lnew (mm) 244 380 198
The rank of the strain on each of these wires from least to greatest is A C B (second option).
How to find the strains on each wires?The strain on each wire can be calculated using the formula:
strain = (change in length) / (original length)
Using this formula, we can calculate the strain for each wire:
A: strain = (244 - 235) / 235 = 0.0383
B: strain = (380 - 342) / 342 = 0.1111
C: strain = (198 - 185) / 185 = 0.0703
Therefore, the strains on the wires, ranked from least to greatest, are:
A (0.0383), C (0.0703), B (0.1111)
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a student completes a pet experiment using chloroplasts from leaves lacking pigments that absorb in the 550 nm to 600 nm wavelength range. which color of light should they avoid in their experiment if they want to measure activity at different wavelengths?
a. Blue
b. Orange
c. Yellow
d. Red
e. violet
The student should avoid using light in the range of 550 nm to 600 nm in their experiment because these are the wavelengths of light that are typically absorbed by chlorophylls in green plants, and the chloroplasts that were used in the experiment lacked pigments that absorb in this range. Here option B is the correct answer.
To measure the activity of the chloroplasts at different wavelengths, the student needs to use a broad range of light wavelengths and avoid using a specific wavelength of light that the chloroplasts cannot absorb.
Of the options given, red light (which has a wavelength range of 620 nm to 750 nm) would be the best choice to avoid in the experiment. This is because red light is absorbed strongly by chlorophyll a and b, which are the primary pigments involved in photosynthesis, and it may interfere with the measurement of activity at other wavelengths.
On the other hand, blue, orange, yellow, and violet light are not strongly absorbed by chlorophylls and can be used in the experiment to measure activity at different wavelengths.
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What is the lowest fixed temperature of Kelvin scale?
The lowest fixed temperature on the Kelvin scale is 0 Kelvin which is also known as absolute zero.
The Kelvin scale is an absolute temperature scale, meaning that it starts from absolute zero, the theoretical lowest possible temperature. Absolute zero is defined as 0 Kelvin (0K), which is equivalent to -273.15 degrees Celsius or -459.67 degrees Fahrenheit. This is the lowest possible temperature that can be reached, and no temperature can be lower than absolute zero. Therefore, the lowest fixed temperature on the Kelvin scale is 0 Kelvin. Absolute zero is the theoretical lowest possible temperature, where the particles in a substance have the least possible amount of thermal energy. At this temperature, the particles would be completely at rest, and there would be no heat energy or movement at the atomic or molecular level.
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Which latitude receives the least amount of heat per unit area from the Sun?
a. 0 degrees
b. 30 degrees north
c. 30 degrees south
d. 66.5 degrees north
Answer:
D
Explanation:
At 66.5 degrees north of the equator, the sun's rays will be less direct ( the sun will not be as high in the sky)
What is st segment depression ?
An electrocardiogram (ECG) result called ST segment depression suggests a problem with the electrical activity of the heart.
The ECG's ST segment is a section that shows the beginning of ventricular repolarization. The ST segment is typically flat or just slightly raised in healthy people.
Nonetheless, there can be a reduction in blood supply to the heart tissue, for instance during an angina episode or a heart attack, which can result in ST segment depression.
Additional factors that contribute to ST segment melancholy include drug interactions, electrolyte imbalances, and other cardiac problems. Doctors can establish the proper therapy and the underlying reason by looking at the intensity and location of the ST segment depression.
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Which of the following are density labels?
g/mL
kg/L
cm^3/g
g/m
Answer:
Below
Explanation:
Density is mass / volume so any of these that have numerator mass and denominator volume qualify
g/ ml and kg/ L are the only ones
Silver has a density of 10.5g/cm3 and gold has a density of 19.3g/cm3. Which would have a greater mass, 5cm3 of silver or 5cm3 of gold ?
Silver has a density of 10.5 g/ [tex]cm^3[/tex] and gold has a density of 19.3 g/ [tex]cm^3[/tex], so out of 5 [tex]cm^3[/tex] of silver or 5 [tex]cm^3[/tex] of gold, the 5 [tex]cm^3[/tex] of gold would have a greater mass as the mass of gold is 96.5 g while the mass of silver is 52.5 g.
What is the relationship between density and mass?The mass of an object is equal to its density multiplied by its volume, so here is the calculation,
For 5 [tex]cm^3[/tex] of silver, the mass is,
mass = density x volume
mass = 10.5 g/ [tex]cm^3[/tex]x 5 [tex]cm^3[/tex]= 52.5 g
For 5 [tex]cm^3[/tex] of gold, the mass is
mass = density x volume
mass = 19.3 g/ [tex]cm^3[/tex]x 5 [tex]cm^3[/tex]
mass = 96.5 g
Hence, silver has a density of 10.5 g/ [tex]cm^3[/tex] and gold has a density of 19.3 g/ [tex]cm^3[/tex], so out of 5 [tex]cm^3[/tex] of silver or 5 [tex]cm^3[/tex] of gold, the 5 [tex]cm^3[/tex] of gold would have a greater mass as the mass of gold is 96.5 g while the mass of silver is 52.5 g.
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Wind energy is increasingly relied upon to help meet global energy needs. Wind energy can be used to generate electricity using wind turbines. What best describes electricity generation using wind turbines? Axes of wind turbines can be either vertical or horizontal; there are benefits (and drawbacks) to each type.
Electricity generation using wind turbines involves converting the kinetic energy of wind into electrical energy. Wind turbines consist of blades that rotate when wind passes over them.
The rotation drives a shaft, which in turn powers a generator that produces electricity. The electricity generated is typically fed into the power grid, where it is distributed to consumers.
Horizontal axis wind turbines (HAWTs) are the most common type of wind turbine and have blades that rotate around a horizontal axis. HAWTs are typically more efficient than vertical-axis wind turbines (VAWTs) because they can capture more energy from the wind.
VAWTs have blades that rotate around a vertical axis and are less common. However, VAWTs can be better suited for certain applications, such as in urban areas where wind direction can be highly variable.
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Mia is holding a 20 N weight without moving. How much work is she doing?
Which is the thickest layer of earth ? a. Crush b. Mantle c. Core d. Ocean
The thickest layer of the earth is the mantle. Option b is correct answer.
The mantle is the layer between the crust and the core, and it makes up about 84% of the earth's total volume. It has a thickness of about 2,900 km, making it much thicker than the crust, which has an average thickness of about 35 km, and the core, which has a radius of about 3,485 km.
The mantle is composed of solid rock that is subject to intense heat and pressure, which causes it to flow like a viscous liquid over very long periods of time. It is divided into the upper and lower mantle, and it plays a crucial role in the movement of tectonic plates and the formation of volcanic activity. Therefore, option b is correct.
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According to the information in the table, when does milo need to leave home in order to get to the basketball game in time to warm up appropriately?.
Milo need to leave home at 8.30am in order to get to the basketball game in time to warm up appropriately.
What advantages does a warm-up have?
Your heart rate and blood flow rise as you warm up. More oxygen can now go to your muscles thanks to this. The connections between your nerves and muscles are also activated and primed during a warm-up, which increases movement efficiency.
In general, warm-ups and cool-downs involve performing your activity more slowly and with lesser intensity. Perform five to ten minutes of low-intensity exercise before working out to warm up. Try exercises like jumping jacks, jogging, or walking. Try dynamic stretches, which get your body moving, as opposed to static stretches.
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The first ionization energy for a gas-phase atom of a particular element is 6.24 X 10^-19 J. what is the maximum wavelength of electromagnetic radiation that could ionize this atom?
A neutral atom in the gas phase needs a certain amount of energy to have its electron removed before it may become ionized. This atom might be ionized by electromagnetic radiation with a maximum wavelength of [tex]8.06 \times 10^{-7} m[/tex]
What is the maximum wavelength of EMR?Using the formula [tex]\lambda = \frac{hc}{E}[/tex], where h is Planck's constant [tex](6.62 \times 10^{-34} J s^{-1} )[/tex] c is the speed of light [tex](2.998 \times 108 \frac{m}{s})[/tex] And is the wavelength of the electromagnetic radiation, one may determine the largest wavelength of electromagnetic radiation that could ionize this atom.
We can determine the largest wavelength that can produce the ionization energy by rearranging the equation. Microwaves have the longest wavelength and the lowest frequency of the electromagnetic waves mentioned.
[tex]\lambda = \frac{hc}{E} = (6.62 \times 10^{-34} Js^{-1} ) \times (2.998 \times 10^{8} m/s) / (6.24 \times 10^{-19} J) = 8.06 \times 10^{-7} m[/tex]
Therefore, The longest wavelength of electromagnetic energy that may ionize this atom is, hence, [tex]8.06 \times 10^{-7} m.[/tex]
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If you are told that an object that weighs 20 Newtons is raised a distance of 10 meters, you know that. O A the force of gravity on the object is 20 Newtons. O B the mass of the object is 20 Newtons. O C the force of gravity on the object is 10 meters. O D the mass of the object is 10 meters. E the acceleration of the object is 200 kilogram-meters.
Answer:
A
Explanation:
A) Force of gravity is 20 N Yes - Force is measured in N
B) No.....mass is generaly measured in KG or sub units of it
C) No ... meters is a measure of distance not force
D) No acceleration is m/s^2
A.
B.
C.
D.
E.
F.
G.
H.
Answer:
झझकोर देने की कोशिश की है और यह बात उस समय की है जब कुंवर जी के लिए एक ही है कि वह इस बात को भी नहीं
A car of mass 1000 kg is moving at a speed of 90 km h–1. Brakes are applied and the car stops at a distance of 15 m from the braking point. If the car stops in 25 s after braking, calculate the average power of the brakes?
Answer:
Pavg =24.4×20800
Explanation:
1st u(initial velocity)=90×5/18=25m/s
v^2-u^2=2as........v=0
a=-20.8 then force=ma =1000×(-20.8)=-20800
P initial=f×u and P final=f×s/t
Pavg=Pi-Pf=fu-fs/t=f(25-15/25)=f(25-0.6)
Pavg=20800×24.4
if you are told that a 20 kilogram object is raised by 10 meters, you know that
It has 10,000 joules of potential energy.
What is potential energy?Potential energy is the energy stored in an object due to its position or configuration. This type of energy is due to the force of gravity and is determined by the mass of the object, the height it is raised, and the acceleration due to gravity.
In this case, the object has a mass of 20 kilograms and is raised by 10 meters. The acceleration due to gravity is 9.8 m/s2. When the object is raised, it gains 10,000 joules of potential energy, which can be calculated using the equation: PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height the object is raised. Thus, in this example, PE = (20 kg)(9.8 m/s2)(10 m) = 19,600 joules.
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what is the calibration nut on a bimetallic stemmed thermometer used for?
The calibration nut on a bimetallic stemmed thermometer is used for: determining if the product's temperature has exceeded safe limits during shipment or subsequent storage.
What is bimetallic stemmed thermometer?Bimetallic stemmed thermometer can check temperatures from 0˚F to 220˚F (–18˚C to 104˚C) and this thermometer measures temperature through its metal stem. When checking the temperature, insert the stem into the food up to dimple.
Bimetal thermometers work on the principle that different metals expand at different rates as they get heated. By using two strips of different metals in thermometer, movement of the strips correlates to the temperature and can be indicated along scale.
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