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A 55.5 kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.800 m around the pole.
a) Determine the force exerted by the horizontal rope on her arms.
b) What is the ratio of this force to her weight?
70 grams of water at 85°C are mixed with an equal amount of water at 15°C in a completely insulated container. How much heat is gained by the cold water
If no, then what will happen if 30 kilocalories of heat is added to the water? Give a numerical result as part of your answer.
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 2.00 x10-4 m2, and the speed of the water is 0.87m/s as it leaves the faucet.
Water at a gauge pressure of 3.0 atm at street level flows into an office building at the speed of 0.40 m/s by a pipe 5.0 cm in diameter. The pipe tapers down to 2.20 cm in diameter by the top floor, 15 m above, where the faucet has been left open. E..
Three capacitors are arranged. C1 has a capacitance of 5.0 pF, C2 has the capacitance of 10 pF, and C3 has the capacitance of 15 pF. Find the voltage drop across the entire arrangement if the voltage drop across C2 is 311 V.
how to Calculate the acceleration of the system. Assume the magnitude of the acceleration is the same during starting and stopping.
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80 kg. A person pushes on the outer edge of one section with a force of F = 75 N that is directed perpendicular to the section. Find out ..
It makes a head on elastic collision at B with a block of mass m2 = 12.0 kg that is initially at rest. Compute the maximum height to which m1 rises after the collision. height = 5m
A meter stick supported at the 50 cm mark has masses of 300 g & 200 g hanging from it at the 10-cm & 60-cm mark, respectively. Where should we hang a third, 400-g mass to keep the meter stick balanced?
An electron accelerated from rest through a voltage of 350V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 28cm, what is the magnitude of magnetic field.
Find the mass flow rate in through the vent in question #1 using the following well-known relationship for the mass flow into an opening:
A highly charged piece of metal (with uniform potential throughout) tends to spark at places where the radius of curvature is small, For that amount of charge, what is the potential of the sphere relative to infinity
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