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Your job is to lift 25 kilogram crates a vertical distance of 0.70 meter from the ground onto the bed of a truck.
(a) Determine how many crates would you have to load onto the truck in 1 minute for the average power output you use to lift the crates to equal 0.50 hp?
(b) Determine how many crates would you have to load onto the truck in 1 minute for an average power output of 150 W?
A hockey puck of mass m = 150 g is attached to a string that passes through a hole in the center of a table, what speed must the hockey puck have
An aluminum rod is 24.0 cm long at 20°C and has a mass of 350 g. If 13,500 J of energy is added to the rod by heat, what is the change in length of the rod
Two particles are fixed to an x axis: particle 1 of charge -4.00 10-7 C at x = 6.00 cm, and particle 2 of charge +4.00 10-7 C at x = 42.0 cm
A beam of high-energy protons emerges from a cyclotron. Is there a magnetic field associated by these particles? Why or why not? There is no magnetic field associated with these protons as there is an electric field around them. There is a magnetic f..
Two wheels have the same mass and radius of 5.0 kg and 0.38 m,respectively. One has (a) the shape of a hoop andthe other (b) the shape of a solid disk. Thewheels start from rest and have a constant angular accelerationwith respect to a rotational axi..
A particle that has an 8.3-?C charge moves with a velocity of magnitude 4 × 105 m/s along the +x axis. Find the magnitude and direction of the magnetic field
In our electrostatics lab, we charge a metal sphere to 1000 V. What is the electric potential due to the charged sphere at a point 1.00 cm from its surface
The near point of a naked eye is 25 cm. When placed at the near point and viewed by the naked eye, Find the focal length of the eyepiece
a falling sky diver reaches terminal speed with her parachute closed. after the parachute is opened what parameters
A motorist suddenly notices a stalled car and slams on the brakes, decelerating at the rate of 6.3 m/s2, How much time elapsed from the initial braking to the collision
A geosynchronous orbit is one in which the satellite orbits above the equator, andhas an orbital period of 24 hours, so that it is always above the same point on the spinning earth. Calculate the altitude of such a satellite.
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.763 rev/s, Calculate the initial and final kinetic energies for this system.
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