A block is placed in oscillation on a frictionless horizontal surface attached to a spring that requires 125 N for the block to be stretched 15 cm away from equilibrium. From this position it is released, and oscillates with a period of 0.25 s. What is the mass of the block?
A. 0.66 kg
B. 4.1 kg
C. 1.3 kg
D. 5.3 kg
C. 1.3 kg
You might also like to view...
Resistivity and Temperature: The temperature coefficient of resistivity of platinum is 3.9 × 10-3/C°. If a platinum wire has a resistance of R at a temperature of 23°C, to what temperature must it be heated in order to double its resistance to 2R?
A. 280°C B. 300°C C. 730°C D. 930°C
Uranus and Neptune have methane clouds but Jupiter and Saturn do not. Which factor explains why?
A) Temperatures on Jupiter and Saturn are too high for methane to condense. B) Jupiter and Saturn do not contain any methane gas. C) The rapid rotation of Jupiter and Saturn prevents methane clouds from forming. D) The stronger gravity on Jupiter and Saturn pulls methane downward so that it can't form clouds.
A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies?
a. 81 N/C b. 61 N/C c. 71 N/C d. 51 N/C e. 25 N/C
The energy released from a nuclear reaction is equal to:
a. energy associated with momentum conservation. b. the exothermic endothermy. c. energy associated with the change in mass. d. the total charge involved.