Resonance occurs when
a. two different objects vibrate with different frequencies.
b. two different objects produce beats.
c. an object having a certain natural frequency is set in vibration by a second object vibrating at that frequency.
d. an object produces a sound.
c
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Work: A crane lifts a 425 kg steel beam vertically upward a distance of 95 m. How much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s2? Neglect frictional forces.
A. 4.7 × 105 J B. 2.7 × 105J C. 3.2 × 105 J D. 4.0 × 105 J
Four equal resistors connected in series have same current and same voltage across each resistor
Indicate whether the statement is true or false
A watt is one ______________ per second
Fill in the blank(s) with correct word
If F = 40 N and M = 2.0 kg, what is the magnitude of the acceleration of the suspended object? All surfaces are frictionless
a.
1.2 m/s2
b.
2.0 m/s2
c.
1.5 m/s2
d.
2.5 m/s2
e.
5.6 m/s2