A coin and a feather have equal accelerations when falling in a vacuum because
A. they have unequal masses but equal weights.
B. the force of gravity on both is the same.
C. both of these.
D. none of the above
Answer: D
You might also like to view...
The force that causes the wind to blow is the ____ force
A) Coriolis B) pressure gradient C) centripetal D) frictional
You have two X-rays taken, and the time of exposure was limited. According the U.S. Nuclear Regulatory Agency, your radiation exposure for the X-rays was
A) below any level to cause harm. B) minimal, but does pose a slight health risk. C) harmless, because medical radiation is not the same dangerous energy as radiation from nuclear energy. D) a different type of radiation that does not cause biological damage.
Low, layered clouds associated with gray, overcast skies are called:
a. cirrus. b. stratus. c. lenticular. d. cumulonimbus.
Which of the following is incorrect regarding climate regions and climate change?
A) The boundaries of climate regions are fairly static. B) Tropical climates are expanding to higher latitudes. C) Subtropical high pressures systems and associated dry conditions are moving to higher latitudes. D) Many areas are becoming more prone to drought. E) Storm systems are shifting to the midlatitudes.