With respect to the earth, object 1 is moving at speed 0.90 c to the right. Object 2 is moving in the same direction at speed 0.70 c with respect to object 1. How fast is object 2 moving with respect to the earth?
A)
0.64 c
B)
1.6 c
C)
0.16 c
D)
0.80 c
E)
0.98 c
E
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Two bodies with masses m1 and m2 are both moving east with velocities of magnitudes v1 and v2, where v1 is less than v2. The magnitude of the velocity of the center of mass of this system of two bodies is
A. less than v1. B. equal to v1. C. equal to the average of v1 and v2. D. greater than v1 and less than v2. E. greater than v2.
Graphical Interpretation of Work: The net force that an animal exerts on a large piece of fruit it has found is observed and is shown in the graph in the figure. If the force is parallel to the motion of the fruit, how much work did the animal do during the encounter?
A. 12.5 J B. 50 J C. 25 J D. 22 J E. 0 J
A 2.00-L container holds half a mole of an ideal gas at a pressure of 12.0 atm. What is the gas temperature? (R = 0.082 1 L/atm/mol/K)
a. 292 K b. 438 K c. 731 K d. 585 K e. 365 K
Momentum: A particle is moving at 0.86c. By what magnitude percentage is the Newtonian expression for momentum in error? (The percentage error is the difference between the erroneous and correct expressions, relative the correct one).
A. 49% B. 40% C. 55% D. 62%