A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below
(a) How high is the bridge from the water below?
(b) How far horizontally does the rock travel before striking the water?
(a) 25.5 m/s
(b) 27.4 m
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Diamond is transparent to the visible spectrum. Gives the index of refraction at 589 nm. Calculate the speed of 589 nm light in diamond.
What will be an ideal response?
Electromagnetic waves of all wavelengths are collectively known as ________.
A. the electromagnetic spectrum B. the visible spectrum C. blackbody radiation D. white light E. a continuous spectrum
A jet plane travels around the world at 2 000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in ?s) be?
a. 0.75 b. 0.50 c. 0.25 d. 1.0 e. 0.19
The amount of heat energy a refrigerator removes from the food stored inside it is ___________ the amount of electrical energy required to run the refrigerator
a. equal to c. less than b. greater than d. unrelated to