When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will
A) read half your weight.
B) read your weight.
C) show readings that when added equal your weight.
D) cancel your weight.
Answer: C
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Work Done by a Gas: A gas is taken through the cycle shown in the pV diagram in the figure. During one cycle, how much work is done by the gas?
A. p0V0 B. 2 p0V0 C. 3 p0V0 D. 4 p0V0
A basketball player lands on the ground after dunking the ball. Is the work done on the player by the contact interaction between the player and ground positive, negative, or zero?
A. Positive B. Negative C. Zero D. One needs more information to answer.
A razor blade nicely shows diffraction fringes when illuminated with
A) ultraviolet light. B) monochromatic light. C) sunlight. D) all of the above E) none of the above
A block (mass = 4.0 kg) sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 100 N/m) which has its other end fixed. If the maximum distance the block slides from the equilibrium position is equal to 20 cm, what is the speed of the block at an instant when it is a distance of 16 cm from the equilibrium position?
a. 71 cm/s b. 60 cm/s c. 80 cm/s d. 87 cm/s e. 57 cm/s