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A tree is growing at the edge of a pond. The top of the treeis seen reflected 75m from the base of the tree and 15m from thefeet of an observer whose eyes are 1.8m above thepond/mirror. How tall is the tree?
An object of mass 6.61 kg is released from rest and drops 1.90 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
Suppose the asteroid starts from rest at a great distance (effectively infinity), falling toward Earth. How much work would have to be done on the asteroid by friction
An object moves 2.90m in the + x- direction under the influence of a 148 N force directed 42 degrees above the x-axis. Find the work done on the object
What velocity must be transferred to the spacecraft to crash it into the sun? Assume it is initially in a solar circular orbit, at the same distance from the sun as the Earth. What velocity must be transferred to the spacecraft so that it will escape..
Objective questions based on kinematics.
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 5.69 10-2 kg/s. What is the speed at which the gasoline moves through the fuel line
Water discharges from a horizontal pipe at the rate of 5.00 x 10-3 m3/s. At point A in the pipe where the cross-sectional area is 2.00 x 10-3 m2, What is the velocity of the water at point A
A very long straight wire carries current 44 A. In the middle of the wire a right-angle bend is made. Determine the magnetic field at the center of the arc
An elevator car of mass 810 kg falls from rest 2.70 m, hits a buffer spring, and then travels an additional 0.350 m, What is the force constant of the spring
When 3.78 g of nonvolatile solute is dissolved in 300.0 g ofwater, the freezing point depression is 0.646 o C. Calculate the molar mass of the solute
A 1 530-kg automobile has a wheel base (the distance between the axles) of 3.30 m. Find the force exerted by the ground on each wheel
assume a charge starts at rest on an equipotential surface, is moved off that surface, and then is eventually returned to the same surface at rest after a round trip. How much work did it take to do this? Explain.
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