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An object of mass 4 kg is initially at rest on a frictionless ice rink. It suddenly explodes into three pieces . One chunk of mass 1 kg slides across the ice with a velocity 1.2 ms-1 i and another chunk of mass 2kg slides across the ice with a velocity 0.8 m.s-1 j. Determine the velocity of the third chunk in magnitude angle form
what happens to speed of sound in air if you quadruple the temperatur of the air, How many times larger does it become
A small coil has a cross section of 5.5 cm2 and consists of 8 turns of wire. If the loop carries a current of 180 mA, what is the torque required to hold the loop
A circuit containing a 8 H inductor has an alternating current supplied to it. If Irms is 5.6 A and Vp is 25 V, find the frequency of the signal
A 80 bike racer climbs a 1500 -long section of road that has a slope of 4.3 degrees. By how much does his gravitational potential energy change during this climb
A cart of mass 240 g is placed on a frictionless horizontal air track. A spring having a spring constant of 6.5 N/m is attached between the cart and the left end of the track. Find the period at which it oscillates
A string with a mass of 6.00 g and a length of 7.00 m has one end attached to a wall; the other end is draped over a pulley, what is the fundamental frequency of vibration
A large wooden turntable in the shape of a flat uniform disk has a radius of 2.00 {\rm m} and a total mass of 120kg. Find the angular speed of the turntable after the parachutist lands
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter, calculate the potential difference between its feet
An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir.
The body in the figure is pivoted at O, and two forces act on it as shown. If r1 = 2.65 m, r2 = 2.20 m, F1 = 4.24 N, F2 = 5.71 N, ?1 = 63.0°, and ?2 = 55.0°, what is the net torque about the pivot
Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them
A patient is undergoing open-heart surgery. A sustained current as small as 25μA can be fatal. find the minimum voltage that poses a danger to the patient
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