A mass m = 2.0 kg is attached to a spring having a force constant k = 290 N/m as in the figure. The mass is displaced from its equilibrium position and released. Its frequency of oscillation (in Hz) is approximately
?
?
a.
12.
b.
0.50.
c.
0.010.
d.
1.9.
e.
0.080.
d
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If a block is set sliding on a huge imaginary frictionless plane in contact with Earth's surface, it will NOT sustain a constant speed because
A) a component of gravitational force parallel to the plane soon acts on it. B) gravity gets weaker as distance increases. C) it is not free from the shackles of Earth's gravity. D) of its inertia.
Star A and star B have the same apparent magnitude. Star A is twice as distant as star B. Therefore, star A has twice the luminosity as star B
Indicate whether the statement is true or false
Car J moves twice as fast as car K, and car J has half the mass of car K. The kinetic energy of car J, compared to car K is
A) 4 to 1. B) 2 to 1. C) the same. D) 42to 1. E) 1 to 2.
Compared to the star it evolved from, a red giant is
A) hotter and dimmer. B) the same temperature and brightness. C) cooler and brighter. D) cooler and dimmer. E) hotter and brighter.