A race car goes around a curve at 50 m/s. The radius of the curve is 400 m. What is the car's acceleration?
6.25 m/s2
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What is the Babcock model?
What will be an ideal response?
A hunter notches a 0.05-kg arrow in a compound bow and draws the arrow back to set the bow. The hunter does 50 J of work in the process setting the bow/arrow combination and then releases the arrow. The speed of the arrow is ___________
Fill in the blank(s) with correct word
The term "relativistic" refers to effects that are
A. measured by stationary observers only. B. observed when speeds are near the speed of light. C. observed when objects move backward in time. D. noticed about a moving object.
Doppler Effect: You are moving at 120 km/h toward a stationary train. The train blows its 0.400-kHz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?
A. 444 Hz B. 439 Hz C. 364 Hz D. 361 Hz