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A rock is projected of the edge of the top of a building with an initial velocity of 12.2m/s at an angle of 53 degree above the horizontal. The rock strikes the ground 25 meter from the base of the building. Suppose that the ground is level and the side of the building is vertical. Determine how tall is the building?
A uniform drawbridge must be held at a 37 degree angle abovethe horizontal to allow ships to pass underneath. Find the magnitude and direction of the force the hingeexerts on the bridge
Two vehicles are approaching an intersection. One is a 2300kg pickup traveling at 14.0m/s from east to west (the ?x- direction), What is the magnitude of the net momentum
The forklift and operator have a combined weight of 10000 lb and a center of gravity at G. Find the maximum vertical acceleration given to a pipe, and the normal reactions acting on the wheels.
When a nerve impulse propagates along a nerve cell, find the magnitude of the change in charge density on the walls on the cell membrane
determine the downward force of the rails on the car when the upside-down car is at the top of the loop
A ball is dropped from height of 20 m above the surface of water in a lake. The refractive index of water is 4 / 3. A fish inside the lake, in the line of fall of the ball, is looking at the ball. At an instant, when the ball is 12.8 m above the wate..
A head-on, elastic collision between two particles with equal initial speed vleaves the more massive particle (massm1) at rest. Find the ratio of the particle masses
Determine the angular momentum of the Earth about its rotation axis (assume the Earth is a uniform sphere)
Comet Halley has an orbital perios of 75 years and when it enters the inner Solar System, it passes within a few AU of the Sun. Determine the average distance of Comet Halley
we mixed up some unknown mass of ice at 0 C with 1 kg of steam at 100 C and soon established thermal equalibrium at 55 C what was the mass of ice
If the free ends of the two cylinders are maintained at constant temperatures of 93?C (steel) and 28?C(copper), how much heat will flow through the cylinders in 25 min
An isolated conductor has net charge +10 x 10-6 C and a cavity with a point charge q = +3 x 10-6 C. What is the charge on the cavity wall and the outer surface
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