Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The potential energy of the crate is mgd

a. True
b. False
Indicate whether the statement is true or false

False

Physics & Space Science

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Which of the following is unique concerning the so-called "Planck's time"?

a. It is the time Planck took to solve the blackbody radiation problem. b. It is the time light takes to travel across a proton. c. It is about equal to the moment of creation of the universe. d. There is no such thing as Planck's time

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A bike (shown in a top view in the diagram) travels around a curve with its brakes on, so that it is constantly slowing down. Which of the arrows shown most closely approximates the direction of the bike’s acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)



A. A
B. B
C. C
D. D
E. E
F. F
T. T

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Physics & Space Science

The higher the frequency of a wave, the

A) shorter the wavelength. B) longer the wavelength. C) neither of these

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Physics & Space Science

What is the El Niño condition?

What will be an ideal response?

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Physics & Space Science