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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 (I have no idea why it happened!). One chunk of mass 1 kg slides across the ice with a velocity 1.2 ms-1i and another chunk of mass 2kg slides across the ice with a velocity 0.8 m.s-1j. Determine the velocity of the third chunk in magnitude angle form.
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 30 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the back..
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 40.0m/s , Find the vertical component of the average force on the ball
A 60.0 g copper calorimeter cup contains 200.0 g of water at 22.0 Co. How much steam must be condensed into the water
Two coils of wire are located close together. Initially, a current of 3.73 Amp exists in one of the coils, but there is no current in the other. Find the mutual inductance of the two-coil system
Racing drivers like to warm up the tyres of their car as soon as possible. One reason is that warm tyres grip the road better but the temperature also affects the pressure of the air into he tyres.
A cubic block of lead alloy 0.1m on a side is placed in a bucket of mercury. What is the magnitude of the buoyant force
At 19°C, a rod is exactly 18.07 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 250°C, What is the coefficient of thermal expansion for the material of which the rod is made
During normal operation, a computer's hard disk spins at 5400 rpm. what is the average angular acceleration of the hard disk
a hockey puck of mass m and radius r slides across frictionless ice. it has translational speed v to the right and
A person is riding a bicycle, and its wheels have an angularvelocity of +20.5rad/s. How much time does it take for the bike tocome to rest
A weather balloon is designed to expand to a maximum radius of20 m at its working altitude, what is its radius at lift off
A parallel-plate air-filled capacitor having area 51cm2and plate spacing 1.0 mm is charged to a potential differenceof 670 V. calculate the energy density between the plates
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