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A 5-kg rock is thrown upward with a force of 150 N at a location where the local gravitational acceleration is 9.79 m/s2. Determine the acceleration of the rock, in m/s2.
A man weighing 720 N lies on a bed of nails. Find the average pressure exerted by a nail on his skin if there are 1210 nails and the flattened point on each nail has a radius of 0.500 mm
Light comes in from air at 3x 108m/sec at 700nm N1=1.00 then it is a new material and slows to 1.5 x 108 m/sec. What is the index of refraction of the material
Assuming that the earth's orbit around the sun is circular, use the appropriate information about the earth to calculate the mass of the sun
two concentric circular coils x and y of radii 16 cm and 10 cm respectively lie in the same vertical plane containing
How far below the release point is the center of mass of two stones at t = 550 ms? (Neither stone has yet reached the ground.)
A dolphin wants to swim directly back to its home bay, which is 0.760 km due west. It can swim at a speed of 4.23 m/s relative to the water, but a uniform water current flows with speed 2.92 m/s in the southeast direction. What direction should th..
During a baseball game, a batter approaches the plate. The pitcher hurtles the ball in the direction of the batter at a speed of 85 miles per hour. What is the relative velocity of the system immediately after the collision
Two billiard balls undergo a glancing collision. Before the collision the first ball was traveling east at 2.6 m/s, what is the speed of the first ball after the collision
At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
an 14 m by 8.5 m house is built on a concrete slab 27 cm thick. what is the heat-loss rate through the floor if the
What focal length does the lens need. Find out the electrostatic force exerted on one sphere by the other.
A hydraulic lift in a garage has two pistons: a small one of cross-sectional area 3.60 cm2, find what minimum force must be applied to the small piston
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