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A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 19.5 kg · m2. She then tucks into a small ball, decreasing this moment of inertia to 3.65 kg · m2. While tucked, she makes two complete revolutions in 1.0 s. If she hadn't tucked at all, how many revolutions would she have made in the 2.00 s from board to water?
A point charge of magnitude 9.15uC is at the center of a cube with sides of length 0.470m. find the electric flux through each of the six faces of the cube
Three identical charges of 3.0uC are placed at the vertices of an equilateral triangle which measures 30cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges
A battery supplies 0.77 A to three resistors connected in parallel. What is the exact current (in A) through the third resistor
A 9.5 kg mess kit sliding on a frictionless surface explodes into two 4.75 kg parts, one moving at 1.5 m/s, What was the original speed of the mess kit
A 13.0 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. Calculate the time constant of the circuit
A football is punted straight up into the air; it hits the ground 5.2 s later. With what speed did it leave the kicker's foot
A pulley system is used to lift a piano 3.4 m. The acceleration of gravity is 9.81 m/s2 . If a force of 2315 N is applied to the rope as the rope is pulled in 17 m, what is the efficiency of the machine
Consider two unknown point charges, Q1( on the left) and Q2 are separated by a distance, o.981m. Find the ratio Q2/Q1 in both magnitude and sign
The classroom temperature is 20 C. The relative humidity is 60%. What is the total humidity (kg of H2O vapor) in the room if its volume is 200 m3.
he Sun has an orbital speed of about 220 km/s around the centre of the Galaxy, Estimate the total mass of the Galaxy in Solar masses
Consider a small, conducting sphere of 0.0010 kg mass. Extra electrons are placed on this sphere, How many electrons must be added to each sphere
A factory worker pushes a 30kg crate a distance of 4.50 meters along a level floor at constant velocity by pushing it downward at an angle of 30degrees below the horizontal. The coefficient of kinetic friction between the crate and the floor is 0...
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