A very light ideal spring having a spring constant (force constant) of 8.2 N/cm is used to lift a 2.2-kg tool with an upward acceleration of 3.25 m/s2
If the spring has negligible length when it us not stretched, how long is it while it is pulling the tool upward?
3.5 cm
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A quantity of water has more entropy when it is
A) frozen ice. B) boiling. C) at room temperature.
The greenhouse effect is contributing significantly to the observed warming of Earth
a. True b. False Indicate whether the statement is true or false
If the amplitude of the motion of a simple harmonic oscillator is doubled, by what factor does the frequency of the oscillator change?
A) 2 B) 4 C) 1 D) 1/2 E) 1/4
A 0.140 kg baseball is thrown horizontally with a velocity of 28.9 m/s. It is struck with a constant horizontal force that lasts for 1.85 ms, which results in a velocity of 37.0 m/s in the opposite direction
What was the magnitude of the horizontal force? A) 0.613 kN B) 2.19 kN C) 2.80 kN D) 4.99 kN