Distinguish between a transverse wave and a longitudinal wave. Give examples of each
What will be an ideal response?
Answer: All waves are vibrations in space and time. In a transverse wave, the vibrations are perpendicular to the direction of wave travel. Vibrations in a longitudinal wave are along (or parallel to) the direction of wave travel. Examples of transverse waves are vibrating strings and electromagnetic waves. Examples of longitudinal waves are sound, those in a to-and-fro vibrating slinky, and some types of earthquake waves.
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A 50.0-kg skier starting from rest travels 200 m down a hill that has a 20.0° slope. When the skier reaches the bottom of the hill, her speed is 30.0 m/s
(a) How much work is done by friction as the skier comes down the hill? (b) What is the magnitude of the friction force if the skier travels directly down the hill?
Planck's quantum theory is compatible with the experimental data related to which of the following?
a. line spectra emitted by hydrogen gas b. the photoelectric effect c. blackbody radiation d. all of these choices
The increase in the amount of carbon dioxide in the atmosphere is responsible for __________
Fill in the blank(s) with correct word
Collisions in Two Dimensions: Two dogs, Rover and Fido, run on a level frictionless surface. Rover runs eastward with a momentum of 24 kg . m/s, and Fido runs northward with momentum 10 kg . m/s. They make a sudden perfectly inelastic collision. What is the magnitude of their combined momentum after the collision?
A. 14 kg . m/s B. 26 kg . m/s C. 34 kg . m/s D. It cannot be determined without knowing the masses and velocities of the dogs.