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A stone is thrown with an initial speed of 15 m/s at an angle of 53degrees above the horizontal from the top of a 35m building. If g=9.8 m/s squared and the air resistance is negligible, then what is the speed of the rock as it hits the ground?
two plates of radius R are separated by a distance 2h.the top plate rotates with velocity w. find the velocity as a function of radius r and and height z
A Light-weight potter's wheel, having a moment of inertia of 24 kg*m^2, is spinning freely at 40.0 rpm. what is the mass of the clay
Lead has a critical temperature of 7. 2 K and a critical field at 4. 2 K of 430 A/cm. (a) What is the critical field at T = 1 K? (b) At 4. 2 K, how much current can a 1-mm-diameter lead wire carry without resistance?
A charge of +47 uC is located at (0, 2.2 m). A charge of -63 uC islocated at (0, 1.6m). For these questions assume that the electricpotential energies are zero at infinity. What is the electric potential at the orgin? What is the electric field (ma..
Runner A is initially 4.6 km west of a flagpole and is running with a constant velocity of 4.8 km/h due east. What will be the distance of the two runners from the flagpole when their paths cross
q1. an airplane is flying with a velocity of 92.0 ms at an angle of 23.0circ above the horizontal. when the plane is a
Two long straight parallel wires are 12cm apart. Wire A carries 1.5A current. Wire B's current is 4.0A in the same direction, Determine the magnetic field due to wire B at the position of wire A
an elevator is moving upward at a constant speed of 4ms. a man standing 10m above the top of the elevator throws a ball
A water skier has a mass of 73 kg. Find the magnitude of the net force acting on the skier when she is accelerated from rest to a speed of 13 m/s in 9.4 s
The solution to Bernoulli's equation, The construction of a flat rectangular roof (3.9 m x 4.3 m) allows it to withstand a maximum net outward force of 20050 N.
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
You are standing at rest with respect to the earth holding a lance which you measure as 10 meters long and a knight traveling on horseback at .7c is holding a lance which he measures as 10 meters long. Which lance hits the other person first
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