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A 15 kg block rests on the surface of a plane inclined at an of 30 degrees to the horizontal. A light inextensible string passing over a small, smooth pulley at the top of the plane connects the block to another 13 kg block hanging freely. The coefficient of kinetic friction between the 15 kg block and the plane is 0.25. Find the acceleration of the blocks
A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. Find the velocity of the rain
A skier of mass 68.4 kg glides down a hill of slope 26.5o at constant speed. If she travels a distance 35.0m down the hill, What is the work done by friction
two small objects a and b are fixed in place and separated by 2.62 cm in a vacuum. object a has a charge of 1.29 micro
Derive an expression for spring potential energy (Us), where the spring force is Fs = -kx and delta U = -Wc, where Wc is the work done by conservative forces
A contact lens prescription calls for +2.25? diopter lenses with an inner curvature radius of 8.6 mm to fit the patient's cornea. If the lenses are plastic with n=1.56, what should be the outer curvature radius
In the dynamic random access memory (DRAM) of a computer, each memory cell contains a capacitor for charge storage. Determine the area A (in ?m2) of the cell capacitor's plates
A 55 kg person riding a bike puts all her weight on each pedal when climbing on a hill. How could she exert more torque
In an experiment, 300 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 54.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum-water system
You gather up your things and quickly flee the hotel. As you make your way through the crowded streets you are forced to conclude that Miquel is supplying information to your would be killers, what is the horizontal speed of the boat after you jump..
A 1.0E-6 F capacitor has a charge of 10.0 microC. It is connected to a 1.0 H inductor at t=0. Which energy is greater
Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, what is the expected angle of refraction in sheet 3
A trap door, of length and width 2.50 meter, is held open at an angle of 65 degree with respect to the floor. find the torque exerted on the trap door by the rope
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