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A 63.0kg skater moving initially at 2.40m/s on rough horizontal ice comes to rest uniformly in 3.41s due to friction from the ice. What force does friction exert on the skater?
A gas is allowed to expand at constant pressure until it reaches its final volume. It is then cooled at constant volume until it reaches its final pressure. find the heat absorbed by the gas
What is the magnitude of the net torque exerted on the branch by the children? Suppose that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
The net work done in accelerating a propeller from rest to an angular speed of 135 rad/s is 1998.5 J. What is the moment of inertia of the propeller
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). The transformer is to deliver 2000 kW to the factory at 95% efficiency. Find values for the the power delivered to the primary
A dentist uses a mirror to examine a tooth. The tooth is 1.04 cm in front of the mirror, and the image is formed 11.1 cm behind the mirror. Determine the mirror's radius of curvature
A coil of inductance 110 mH and unknown resistance and a 1.4 ?F capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
Using a ball that has unknown mass m. You plot your data in the form of f2 versus M/L, with f in rev/s,M in kg, and L in m. calculate the mass m of the ball
A proton is confined within an atomic nucleus of diameter 3.5 fm. Estimate the smallest range of speeds you might find for a proton in the nucleus
A plane leaves the airport in Galisto and flies 170 km 68 degrees east of north and after that changes direction to fly 230 km at 48 degrees south of east, after that it makes an immediate emergency landing in a pasture. When airport sends out a r..
You wish to launch a satellite that will remain above the same spot on earth's surface. calculate the radius of the circular orbit this satellite must have
The maximum gauge pressure in a hydraulic lift is 15.0atm. What is the largest size vehicle (kg) it can lift if the diameter of the output line is 30.1cm
A sample contains 8.90×104 radioactive nuclei. In a time of 5 minutes, 1.90×103 of the nuclei decay. Evaluate the half life of the sample
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