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How much work does an elevator motor do to lift a 1100 kg elevator a height of 100?
How much power must the motor supply to do in 60 s at constant speed?
A solar flare blowing out from the sun at 0.90 c is overtaking a rocket as it flies away from the sun at 0.60 c. with what speed is the flare gaining on the rocket
A wrecking yard inventor wants to pick up cars by charging a 0.400 m diameter ball and inducing an equal and opposite charge on the car. What is the electric field near the surface of the ball
Consider the circuit in the figure below. Take emf = 6.00 V, L = 7.00 mH, and R = 6.00 O. What is the value of the final steady-state current
rail car that weighs 43 N is accelerated at 8.9 m/s/s for 4.5 seconds. How much work is done on the rail car
what was the cars original kinetic energy? after the car has stopped, what is the change in temperature of the brakes and wheels?
the speed of sound in aluminum is 5000 ms. we excite standing waves in a rod of aluminum 1.30 m long such that there is
a 0.0320-g positive charged ball with charge q 5.05 oc is resting on a flat frictionless horizontal surface. for a
The number of radioactive nuclei in a particular sample decreases to one-eighth of the original amount in 21 days. What is the half-life of the these nuclei
1. The catapult on an aircraft carrier can take an aircraft weighing 300,000 N from 0 to 180 mph in 12.7 seconds, at which time the aircraft launches. What is the acceleration of the aircraft when it launches? Express your answer in the MKS system..
What must be the magnitude of the electric field so that the particle is not deflected if the magnitude of its velocity is 2.0×105cm/s?
Covelant and ionic bonds differ in that:
The little Dutch boy saved Holland by sticking his finger in the leaking dike. If the water level was 2.5 m above his finger, estimate force of the water on his finger
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