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yanalaym [24]
4 years ago
9

What is power?

Physics
2 answers:
Scrat [10]4 years ago
7 0

This question asks you what power is.

Your answer would be B) Power is the rate at which work is done

Power is not the amount of work that is being placed, but is a rate that could be measured.

For example, when you use more power, you would get things done more quickly. When you use less power, you get things done less quickly.

A visual example of the rate of power is charging an electric car. The more power you use to charge the car, the more quicker the car gets charged.

People mistakenly get mixed up with answer choice A, due to the fact that they see the word "rate", but the rest of the statement is false.

Therefore, answer choice B) Power is the rate at which work is done would be the correct answer.

e-lub [12.9K]4 years ago
4 0

Answer:

B) Power is the rate at which work is done

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What is sound reverberation?
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Sound reverberation is created when sound or signal is reflected.
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3 years ago
An element had 82 protons, 83 neutrons, and 82 electrons. What is the symbol of the element
serg [7]
Name: Lead
Symbol: Pb
Atomic Number: 82
Atomic Mass: 207.2 amu
Melting Point: 327.5 °C (600.65 K, 621.5 °F)
Boiling Point: 1740.0 °C (2013.15 K, 3164.0 °F)
Number of Protons/Electrons: 82
Number of Neutrons: 125
Classification: Other Metals
Crystal Structure: Cubic
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3 years ago
A driver brings a car to a full stop in 2.0 s. If the car was initially
vagabundo [1.1K]

Answer:

\boxed {\boxed {\sf D. \  -11 \ m/s^2}}

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

a=\frac{v_f-v_i}{t}

where Vf is the final velocity, Vi is the initial velocity, and t is the time.

Since the car came to a complete stop, it's final velocity was 0 meters per second.

The initial velocity was 22 meters per second.

The time was 2.0 seconds.

v_f=0 \ m/s\\v_i=22 \ m/s\\t= 2.0 \ s

Substitute the values into the formula.

a=\frac{0 \ m/s-22 \ m/s}{ 2.0 \s }

Subtract in the numerator first.

  • 0 m/s- 22 m/s = -22 m/s

a=\frac{-22 \ m/s}{2.0 \ s}

Divide.

a= -11 \ m/s^2

The acceleration of the car was -11 meters per square second. The negative acceleration indicates slowing down/stopping.

8 0
3 years ago
What do you call rocxs that form under intense heat and pressure
kirill [66]

Metamorphic

Metamorphic rocks are formed under the surface of the earth from the metamorphosis (change) that occurs due to intense heat and pressure (squeezing).

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Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal
Alexeev081 [22]

Answer:

1.79 cm^{3}

Explanation:

by the definition ,

density =\frac{mass}{volume}\\ volume=\frac{mass}{density}\\=\frac{38.5 g}{21.5 gcm^{-3} } \\=1.79 cm^{3}

6 0
4 years ago
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