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A stone is dropped into a river from a bridge at a height h above the water. Another stone is thrown vertically down at a time t after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone? Give your answer in terms of the given variables and g.
Explain the physical reason for this observed behavior
A solenoid is 1.6 m long and has 530 turns per meter. what is the cross sectional area of this solenoid if it stores .31 J of energy when it carries I=14A
A bullet of mass mB = 0.0149 kg is moving with a speed of 102 m/s when it collides with a rod of mass mR = 7.85 kg and length L= 1.08 m, How much kinetic energy is lost in the collision
A 2 m long diving board rests on two supports C and D. C is placed at the left end. The mass of the diving board is 10 kilogram. Estimate the magnitude of force D
A car of mass 1540 kg rests on a hydraulic lift with a piston of radius 0.27 m that is connected to a second piston of radius 0.031 m. what is the force at the second piston
A 50.0 kilogram boy stands at the rim of a merry-go-round of radius1.60 meter, rotating with an angular speed of 3.10 rad/s. Determine what is the boy centripetal acceleration
the maximum wavelenght for photoelectric emission in tungsten is 230 nm. what wavelength of light must be used in order
A baseball (m = 155 g) approaches a bat horizontally at the speed of 40.5 m/s (91 mi/h) and is hit straight back at a speed of 45.5 m/s (102 mi/h).
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
Two pendulums are allowed to rotate frictionlessly and without air resistance around the same point of rotation, Where do the masses collide
We have a hollow metallic sphere with charge -5.0 µC and radius 5.0 cm. What charge now rests on the outer surface of the sphere
A box of 10 kg is being pulled across a floor with a tension force of 50 N. Assume the box started from rest and reached a speed of 2 m/s
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