During takeoff a jet aircraft goes from 0 m/s to 60 m/s in 5 seconds. (a) What is the jet's acceleration? (b) What is the jet's speed after 22 seconds?
12 m/s2, 264 m/s
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A gas originally occupies a volume of 0.5 m3 at a pressure of 100 kPa. It is slowly allowed to expand until the volume is 2.5 m3. Assuming the temperature is kept constant, the final pressure will be
A. 10 kPa. B. 50 kPa. C. 500 kPa. D. 100 kPa. E. 20 kPa.
How many moons is Pluto known to have?
A) none B) three C) one D) four E) two
The energy in the water at the top of a waterfall is an example of gravitational potential energy
a. True b. False Indicate whether the statement is true or false
A ball falls from the top of a building, through the air (air friction is present), to the ground below. How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building?
A) K is equal to U. B) K is greater than U. C) K is less than U. D) It is impossible to tell.