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An iron ball having a mass of 5 kg is lifted from the floor to a height of 2.5 meters above the floor. (Remember, kilograms (kg) is a measure of mass, not of weight.)
a) How much work was done to lift the ball?b) How much potential energy did the ball gain?c ) If the motor lifting the ball raises it 2.5 meters in tenseconds, what is its power?
a dynamite blast at a quarry launches a rock straight upward and 2.3 s later it is rising at a rate of 14 ms. assuming
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the value of the angle theta
Suppose the pressure of the gas equals to p=aV^2, where a is constant. Find the heat transfer to the gas during this process
A 3.9 kg block of copper at a temperature of 70oC is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg, How much ice was in the bucket before the copper block was placed in it
Consider a particle of mass m moving in a vertical x-y plane along a curve y=acos(2xπ/λ). free fall acceleration is g. First consider two coordinates x and y:
two wires a and b made of the same material and having the same lengths are connected across the same voltage source.
Gas is confined in a tank at a pressure of 9 atm and a temperature of 15 degrees C. what is the new pressure in the tank
a point charge moving in a magnetic field of 1.24 tesla experiences a force of 0.813e-11 n. the velocity of the charge
calculate the electric field on the axis of the disk at 5 cm, 10 cm, 50 cm, 200 cm from the center of the disk
Assuming that f = 60 Hz, Vs = 10 volts, R = 1000 Ohms, L = 0.1 mH and C = 0.01 F, calculate the peak current through each component
a skateboard with mass M rolls down a ramp, starting from rest. It takes a time T to roll a distance L along the ramp
A pipe carrying 20°C water has a diameter of 2.4 cm. Estimate the maximum flow speed if the flow must be streamline
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