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A machine gun fires 25-g bullets at the rate of 4 bullets per second. The bullets leave the gun at a speed of 1000 m/s. What is the average recoil force experienced by the machine gun?
In the park, several children with a total mass of 240 kg are riding a merry-go-round with a rotational inertia of 1500 Kg*ms2 and a radius of 2,2m. what is the rotational velocity after the children move tot he center, igoring frictional torque
Uniform plate of height 1.980 m is cut in the form of a parabolic section. Find the moment of inertia of the plate
q1. an electric circular saw is designed to reach its final angular speed starting from rest in 1.40 s. its average
There is an electric field of 113N/C directed along the + x axis. If the string makes an angle 26 degrees with the y axis when the sphere is in stability, what is the charge on the sphere.
Two bars, A and B, each of length 2.0 m and cross sectional area 1.0 m2, are placed end to end, What is the rate of heat transfer through this combination
A 56 kg pole vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. determine her altitude as she crosses the bar
An electron is moving in a concentric circular orbit inside a solenoid of radius 4.89 cm, in such a manner that it grazes the inside surface of the coil at all the points of its orbit. What electric current is passing through the solenoid
The speed of a bobsled is increasing, because it has an acceleration of 2.99 m/s2. compute the magnitude of the net force that acts on the bobsled
A bird stands on an electric transmission line carrying 1200 A. of current. The line has 6.0E-05 ohm resistance per meter, What voltage does the bird feel
Two boxes of mass 6.10 and 5.00 kg are in contact and are accelerated across a horizontal surface by an force of 43.17 N applied parallel to the surface and pushing on the lighter box. What is the magnitude of the force exerted by the heavier box o..
You are designing an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.57 times the passenger's weight. What is the maximum speed of the elevator
The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. determine the recovery time (in hours) of the unit
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