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A 3 x 10^2 kg piano is being lifted at a steady speed from groundlevel straight up to an apartment 10.0 m above the ground. Thecrane that is doing the lifting produces a steady power of 4.00 x10^2 W. How much time does it take to lift the piano?a. 73.5 sb. 64.7 sc. 55.1 sd. 69.5 se. 60.0 s
t the vertices of a square are located four identical positive point charges. what is the charge on one of the positive point charges
An objects average density ? is defined as the ratio of its mass to its volume. What is the earth's average density
question1water moves through a constricted pipe in steady ideal flow. at one point where the pressure is 2.70 104 pa
In the process represented in the figure, 2.4 moles of an ideal monatomic gas start at state a, with pressure 1 atm (1.01*10^5 N/m^2), Find the net work done by the gas in one cycle
An airplane flies 200 km due west from city A to city B and then 315 km in the direction of 33.0° north of west from city B to city C.
A 41 kg crate, starting from rest, is pulled across a floor with the constant horizontal force of 250 N. For the first 10m the floor is frictionless, and for the next 11.00 m the coefficient of friction is 0.17. What is the final speed of the crat..
Two disks, (Disk A and Disk B) each having the same mass and Inertia of I=1/2MR^2 are rolling on the floor and then up ramps. The ramp for Disk A has friction, How much farther does it roll
An empty hollow metal sphere has a potential of +170 V with respect to ground (defined to be at V = 0) and has a charge of 1.1 10-9 C
Newton's law of gravity states that the force on an object by the Earth follows an inverse square law: 0 2 E g m m F G x ? ? where G is a constant (the universal gravitational constant), How much work is done moving the object from x ? ? to x ? R
a man swimming at 3 m/s crosses a river flowing East at 1 m/s. The river is 300 m wide. At what angle to the bank should he swim
Two wires on a piano are the same length and are stretched to the same tension. Wire 1 vibrates at a frequency 1.5 times that of wire 2. Calculate the ratio of their masses (m1/m2).
question1it has been asserted that a permanent magnet is really just made up of an insulator with fixed positive
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