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If a person (m=7 kg) launches into an orbit with an altitude of 78 km, what is the gravitational force between him and the earth? With this force, what is the resulting acceleration of the earth due to the person's pull?
The "power cube" transformer for a portable CD player has an output of 4.5 V and 550 mA (both rms) when plugged into a 120 V/60 Hz outlet. What is the peak current in the primary coil
A speaker and two microphones are arranged inside a sealed container filled with neon gas. What is the speed of sound in neon gas
A military helicopter on a training mission is flying horizontally at a speed of 90.0m/s when it accidentally drops a bomb, How much time is required for the bomb to reach the earth
if the radius of the equipotential surface of a point charge is 10.5 m, what are the magnitude and sign of the point charge
The potential difference between the terminals of a battery is 12V when measured directly using a voltmeter. What is this maximum power
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wound around the inner core. What is the speed of the spool's ground-touching point
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much work is done by the device on the gas
question a cubic meter of copper has a mass of 8930kg. the block of copper is lowered into a lake by a strong cable
A 100kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30 below the horizontal. The coefficient of kinetic friction is 0.20. What must be the magnitude of P, so that the net work completed by it and the kinetic..
a spring is hung from a ceiling and an object attached to its lower end stretches the spring by a distance of 5.00 cm
A force of 250N acts on a mass of 50Kg for 8 seconds. If the mass is initially at rest, determine the acceleration, the final velocity and the displacement.
An x-ray machine uses 260 kV rms at80.0 mA rms when it is operating. The power source is a 420 V rms line.
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