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A girl is standing at the edge of a cliff 111 m above t\he ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed of 8.79 m/s.
a) How long does it take the rock to hit the ground?
b) What is the speed of the rock the instant before it hits the ground?
A railroad car of mass 40900 kg moving at 3.35m/s collides and couples with two railroad cars,each of the same mass as the single car and moving in the same direction at 1.53m/s. what is the speed of three cars after the collision.
You pull your 55.00 kg friend on a 5.00 kg sled across a patch of snow. You pull using a 48-N force on a rope that makes a 35 degree angle with the horizontal. If the friction force between the sled and the snow is a mere 5-N what is the normal fo..
A car is traveling in the x direction with a velocity of 20 m/s. The driver applies the brakes, What is the stopping distance
q1. a 0.850 kg block is attached to a spring with spring constant 16.0 nm. while the block is sitting at rest a student
At a distance of 60.0 km from a radio station antenna the electric-field amplitude is 7.60×10?2 V/m. what is the total power output of the station
A hydrogen atom is in the 11s state. Determine the quantum number and Determine the orbital angular momentum in terms of hbar
A hoop and a disk, both of 0.58- m radius and 3.0- kgmass, are released from the top of an inclined plane 2.5 m high and 8.8 m long. What is the speed of each when it reaches the bottom? Assume that they both roll without slipping. What is the spe..
The system shown to the right is in equilibrium. The steel block has a mass m1 and the uniform rigid aluminum strut has a mass The strut is hinged so that it can pivot freely about it's bottom end. The angle between the left wire and the ground is an..
A metal must absorb radiation with a minimum frequency of 1.94 e15 Hz before it can emit an electron from its surface via the photoelectric effect, find the speed of the photo-electrons
How several 90-rm W, 120-rm V light bulbs can be connected to a 20-rm A, 120-rm V circuit without tripping the circuit breaker.
Show that the transformation of the horizontal pressure gradient force from z to isentropic (potential temperature ? ) coordinates is given by 1 z p M ? ? ? =? , where p M = c T +? is the socalled Montgomery streamfunction.
A pendulum of length 1.5 m is held out to point A. At the vertical position, an overhang effectively cuts the length of the pendulum by an amount equal to 1.09 m. (That is, 1.0 m is no longer free to swing.) How long does this pendulum take for one o..
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