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A car accelerates from 0 to 30 mph in 1.5s. How long does it take for it to accelerate from 0 to 60 mph, assuming the power of the engine is independent of velocity and neglecting friction?
Two identical conducting spheres, fixed in place, attract each other with a force of 0.083 N when their center to center separation is 45.00 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres have a..
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 5.5 m once every 21.0 s. What is the angular speed of the Ferris wheel
A beam of protons moves in a circle of radius 0.34 m. The protons move perpendicular to a 0.29-T magnetic field. What is the speed of each proton
A small solid ball of mass M and radius R rolls without slipping on the track whose height y as a function of horizontal position x is given by y=ax^2, Find an expression for the period of the resulting motion
To stretch a certain spring by 2.20 from its equilibrium position requires 7.00 of work. What was the maximum force required to stretch it by that distance
A 6.90-g lead bullet traveling at 420 m/s is stopped by a large tree. what is the increase in temperature of the bullet
A small sculpture made of brass (rbrass = 8470 kg/m^3) is believed to have a secret central cavity. What is the volume of the secret cavity
On a brisk walk, a person burns about 380 Cal/h. At this rate, how many hours of brisk walking would it takes to lose a pound ofbody fat? ( A pound of body fat stores an amount of chemical enegy equivalent to 3500 Cal.)------h
A man pushes a lawnmower for 13.1 m along a handle that makes a 28.2° angle with the ground. He pushes with a force of 42.8 N even as the force of friction between the lawnmower and the ground is 13.7 N.
A man wants to swim across a river that flows N to S at 5 m/s.He can swim at a speed of 7m/s. how far south did he travel
A 0.700-kg ball is on the end of a rope that is 1.30 m in length. The ball and rope are attached to a pole, determine the tangential speed of the ball
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