Two identical arrows, one with twice the speed of the other, are fired into a bale of hay. Compared with penetration of the slow arrow, the faster arrow penetrates
A) the same distance.
B) two times as far.
C) four times as far.
D) more than four times as far.
E) none of the above
Answer: C
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A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. Assuming a constant acceleration, how long did it take the bullet to stop?
What will be an ideal response?
Blue light differs from red light in that
a. blue light has a higher energy than red light. b. blue light has a lower energy than red light. c. blue light has a shorter wavelength than red light. d. blue light has a longer wavelength than red light. e. More than one of the above.
The density of an object is defined as
A. the volume occupied by each unit of mass. B. the amount of mass for each unit of volume. C. the weight of each unit of volume. D. the amount of the substance that has unit volume and unit mass. E. the amount of the substance that contains as many particles as 12 grams of the carbon-12 isotope.
Einstein's famous equation E = mc2 is a statement of the equivalence of energy and the square of the speed of light
a. True b. False Indicate whether the statement is true or false