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A wooden block slides directly down an inclined plane, at a constant velocity of 6.0 m/s. How large is the coefficient of kinetic friction, if the plane makes an angle of 25 degrees with the horizontal?
Suppose you have a spherical balloon filled with air at room teperature and 1.0 atm pressure; its raidus is 12cm. what's the balloon's new radius
q1. charge of uniform density 80 ncm3 is distributed throughout a hollow cylinder region formed by two coaxial
A power station delivers 530 kW of power at 12,000 V to a factory through wires with total resistance 3.5. How much less power is wasted
Find the maximum temperature in a Carnot cycle operating in a room-temperature (23 degrees C) environment if its Carnot efficiency is 0.2. Express your answer using one significant figure. TH = ? K
A 370-g block is dropped onto a vertical spring with spring constant k=3.2 N/cm. While the spring is being compressed, what work is done by the block's weight
assume a planet had a density that varied with radius according to the equation, ρ =A/r, where A is some constant. Determine a formula that gives the central pressure for this kind of planet.
Another laser amplifier gives an output of 5I0 when it receives input intensity I0 tuned to w0, the centre frequency of the laser transition. When the input radiation istuned to nearby angular frequency w1
Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
A block of mass 20kg is dropped into water. What force should be applied to pull it to the surface if its volume is 0.001m^3? Density of water is 1000.0kg/m^3
Five objects, each of mass M, are equally spaced on the arc of a semicircle of radius R, find gravitational field at the center of curvature of the arc
A portable CD player operates with a voltage of 8.00 V, and its power usage is 0.264 W. Find the current in the player
The earth is 1.49*10^11 meters from the sun. If the solar radiation at the top of the earths atmosphere is 1340 W/m^2, what is the total power output of the sun
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