As a sinusoidal wave’s wavenumber increases, the wave’s wavelength (in a non-dispersive medium)
A. Increases.
B. Decreases.
C. Does not change.
B. Decreases.
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You slam on the brakes of your car in a panic, and skid a certain distance on a straight, level road. If you had been traveling twice as fast, what distance would the car have skidded, under the same conditions?
A) It would have skidded 4 times farther. B) It would have skidded twice as far. C) It would have skidded times farther. D) It would have skidded half as far. E) It is impossible to tell from the information given.
Velma is in a train moving eastward at 20 m/s. She throws a ball toward the rear of the train, throwing it at her normal "throwing speed" of 20 m/s. What is Mort's observation, regarding the ball?
A) It moves westward at 20 m/s. B) It moves eastward at the same speed of the train, just keeping up with the train. C) It moves westward at 40 m/s. D) It moves eastward at 40 m/s. E) It falls straight down.
When we think of electric potential difference, we are thinking about
A) current. B) voltage. C) resistance.
Two identical blocks are pulled as shown along rough horizontal surfaces with the same coefficient of friction. Both are pulled at constant speed v. Which tension force does more work moving the block a distance D along the surface?