The solution to a problem is the equation below. Which description best fits this solution?
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A. A vertical spring compressed 0.120 m shoots a 2.00-kg mass 2.90 cm above the equilibrium position of the spring.
B. A vertical spring stretched 0.120 m shoots a 2.00-kg mass 9.10 cm above the equilibrium position of the spring.
C. A vertical spring compressed 0.120 m shoots a 2.00-kg mass 12.0 cm above the equilibrium position of the spring.
D. A vertical spring compressed 0.120 m shoots a 2.00-kg mass 14.9 cm above the equilibrium position of the spring.
E. A 2.00-kg mass has fallen 0.820 m and compressed the upper end of a vertical spring 12.0 cm below the equilibrium position.
Answer: A
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A container of ideal gas has a movable frictionless piston. This container is placed in a very large water bath and slowly compressed so that the temperature of the gas remains constant and equal to the temperature of the water
Which of the following statements about this gas are true for this process? (There may be more than one correct choice.) A) The internal energy of the gas increases during the compression because work is done on the gas. B) Since the gas and water are at the same temperature, no heat can flow between them, which makes this an adiabatic compression. C) The internal (thermal) energy of the gas does not change during the compression. D) Heat leaves the gas during the compression. E) Since the temperature of the gas remains constant, the pressure of the gas must also remain constant.
A long nonconducting cylinder (radius = 12 cm) has a charge of uniform density (5.0 nC/m3) distributed throughout its column. Determine the magnitude of the electric field 5.0 cm from the axis of the cylinder
a. 25 N/C b. 20 N/C c. 14 N/C d. 31 N/C e. 34 N/C
NASA satellites stay up because
A) they are moving so fast that they are able to "fall" around Earth. B) their rocket engines hold them above Earth's surface. C) there is no air resistance in outer space and thus no downward force on an orbiting satellite. D) they are away from Earth's gravity and thus do not get pulled down toward Earth. E) centrifugal force pulls outward on them.
A ventilation fan with a moment of inertia of 0.034 kg·m2 has a net torque of 0.11 N·m applied to it. If it starts from rest, what angular momentum will it have 9.0 s later?
a. 0.88 kg·m2/s b. 0.99 kg·m2/s c. 2.0 kg·m2/s d. 3.3 kg·m2/s