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A hydraulic jack is made with a small piston 1.1 cm in diameter that is used to move a large piston 5.3 cm in diameter. If a man can exert a force of 420 N on the small piston, how heavy a load can he lift with the jack?
A hand-cranked AC generator is used to cause 0.65 A of current (rms), What is the minimum average rate at which work must be done on the generator
A bullet of mass mB=1.09?10?2kg is moving with a speed of 101.m/s when it collides with a rod of mass mR=6.51kg and length L=1.04m, What is the change in kinetic energy in the collision
An 8000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs.
A certain string on a piano is tuned to produce middle C (f1= 261.63 Hz) by carefully adjusting the tension in the string
Gas in a cylinder similar to the one shown in the figure moves a piston with area 0.223 m2 as energy is slowly added to the system. find the displacement of the piston
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 4 10-10 m along the y axis. The +e charge is on the -y axis. Calculate the force on a proton due to this dipole at a location ..
A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle's position as a function of time is x(t) = 50.0 cm +(2.00 cm/s)t -(.0625 cm/s^2)t^2 At what time is the turt..
The circular disk shown rotates in a horizontal plane. A 3-lb block rests on the disk 8 in. from the axis of rotation. find the length of time required for the block to begin to slip
What is this value? In this state, the interference pattern still appears showing that each individual electron can interfere with itself.
A 10 \rm g bullet traveling at 440m/s strikes a 12kg , 1.2-\rm m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, What is the angular velocity of the door just after impact
If a helium nucleus with a mass of 6.68 10-27 kg, a charge of +2e, how close will the helium atom come to the gold nucleus before it stops and turns around
A massless pan hangs from a spring that is suspended from the ceiling. When empty, the pan is 50cm below the ceiling. What is the pan's distance from the ceiling when the spring reaches its maximum length
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