A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically. Which object is traveling faster when it hits the level ground below if we neglect air?
A) It is impossible to tell because we do not know their masses.
B) the stone
C) the ball
D) Both are traveling at the same speed.
C
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While the orbits of planets are nearly circular, the eccentricities of the orbits of ________ are near one
Fill in the blank(s) with correct word
A 50-kg satellite circles planet Cruton every 5.6 h in an orbit with a radius of 12 × 10^6 m. What is the magnitude of the gravitational force on the satellite by planet Cruton?
a. 63 N b. 58 N c. 68 N d. 73 N e. 50 N
An apple weighing 3 newtons hangs, motionless, from a tree branch. What are the forces by the environment that act on this apple?
A) There are no forces by the environment on a motionless apple. B) The apple's weight and the apple's downward pull on the branch. C) Only the apple's weight. D) Only the upward lift of the branch. E) the apple's weight and the branch's upward lift on the apple.
On a PV diagram, 2 curves are plotted, both starting at the same point and both ending at the same final increased volume. One curve is for an isothermal process; the other is for an adiabatic process. What does the area between these two curves represent?
a. Q absorbed by the isothermal process. b. W done by the adiabatic process. c. ?U for the isothermal process. d. Neither Q, W, nor ?U for either of the processes is represented.