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1-) A 56.0kg cheerleader uses an oil-filled hydraulic lift to hold four 110kg football players at a height of 1.30m. If her piston is 19.0cm in diameter, what is the diameter of the football players' piston?
2-) A 0.500m -diameter vat of liquid is 2.20m deep. The pressure at the bottom of the vat is 1.30atm. What is the mass of the liquid in the vat?
A playground merry-go-round has a radius of 4.60 {rm m} and a moment of inertia of 250 kg m^2 and turns with negligible friction about the vertical axle through its center.
A wrecking ball (weight = 4800 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3600 N. As support cable runs from the top of the boom to the tractor.
What would happen to the gravitational force between Earth and the Sun. A reconnaissance plane flies 600 km away from its base at 240 km/h, then flies back to its base at 320km/h.
The battery of a pocket calculator has a voltage of 4.0 V and devilers a current of 0.29 mA. In one hour of operation How much charge flows in the circuit
Find out the maximum height reached by the rocket.
what is the strength of the electric field 4.0cm from a small glass bead that has been charged to positive 4.0cm?
A 240g block on a 60cm-long string swings in a circle on a horizontal, frictionless table at 70rpm.
If the activation energy for the vacancy formation is given as 0.77 eV for aluminium at (650 degrees Celcius) ^3, what would be the number of vacancies at 650 degrees Celsius? The atomic weight and the density of aluminium is 26.98 g/mol and 2.62 ..
Does current through a power supply increase when parallel bulbs are added? For example, if you have a circuit with one bulb and measure the current through the bulb to be 100 mA, what is the current through the power source when you add another b..
An electron accelerated from rest through a voltage of 350V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 28cm, what is the magnitude of magnetic field.
A skier is accelerating down a 30 degree hill at 3.60 m/s^2. How long would it take her to reach the bottom of the hill, assume she starts from rest and accelerates uniformly, if elevation change is 170m.
A 1100kg automobile travels at 80km/h. What net work would be required to bring it to a stop
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