A 30x10 sup2 kg piano is being lifted at a steady speed
1) A 3.0x10 ² kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground. The crane that is doing the lifting produces a steady power of 4.0x10 ² W.
How much time does it take to lift the piano?
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A 3.0x10 ² kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground. How much time does it take to lift the piano
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Question: What do we call the degree to which an assessment measures the hypothetical behavior that it claims to measure?