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Construction cranes are able to balance heavy loads by using a counterweight. The crane operator can slide the entire torque arm horizontally in order to balance the load. If the torque arm has a total length of 56m and a mass of 750 kg, and the counterweight has a mass of 2500 kg, where should the operator position the pivot point to balance a 860 kg object?
The largest diamond ever found had a size of 3106 carats. One carat is equivalent to a mass of 0.200 g. determine the weight of this diamond in pounds
A movig particle encounters an external electric field that decreases its kinetic energy from 9130 eV to 7570 eV as the particle moves from position A to position B, Determine the charge of the particle
An elevator is able to raise 9,800 N to a height of 22 m in 14 s. How much work does the elevator do
A truck of mass 2200kg leaves town moving at 25 m/s to the north. Outside town, the truck turns north-east and changes speed to 40 m/s. What is the change in the truck's momentum
A certain substance has a mass per mole of 36 g/mol. When 319 J is added as heat to a 35.0 g sample of this material, How many moles of the substance are present
An object of mass 5.26 kg is released from rest and drops 1.95 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
A charged particle is injected at 143 m/s into a 0.0855-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
A refracting telescope is used to view the Moon (diameter 3480 km, distance from Earth 385,000 km). What is the diameter of the image produced by the objective
Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a point on its axis a distance 2R from the center
A gymnast with mass m1 = 49.0 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 119.0 kg and length L = 5.0 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left e..
The power required by an ice maker is 225 W and is the rate at which it does work. The ice maker operates like a refrigerator or an air conditioner and has a coefficient of performance of 3.60.
A baseball player hits a double and ends up on second base. A baseball "diamond" is a square, each side of length 27.4 m, What is the magnitude of the player's displacement
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