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An ice skater starts with a rotational inertia of 31.2 kg m22 and an angular velocity of 27.6 rad/s. As they bring their arms in, their rotational inertia decreases to 15.5 kg m. What is their final angular velocity?
A water pipe having a 2.9 cm inside diameter carries water into the basement of a house at a speed of 0.92 m/s and a pressure of 170 kPa. The pipe tapers to 1.0 cm and rises to the second floor 7.1 m above the input point. The speed at the second flo..
What is the total mass of the earth's atmosphere? (the radius of the earth is 6.37X10^6m. and atmosphere pressure at the surface is 1.013X10^6N/m^2)
4.71 mol of neon gas is initially at a pressure of 4.23 atm and a temperature of 282oC. If the gas is cooled at constant pressure, until the volume is one third of the initial volume, what is the final temperature
A ball is held a distance of 20m above the ground. It's mass 6kg. what is it's potential energy(PE) at this point? the ball dropped. What is it's PE 8m above the ground?
The ball rebounds straight upward to a height of 0.700 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
A horizontal force of magnitude 36.4 N pushes a block of mass3.81 kg across a floor where the coefficient of kinetic friction is0.640. find the increase in the kineticenergy of the block
An open-topped freight car with mass 24000 is coasting without friction along a level track. Since the rain is falling downward, how is it able to affect the horizontal motion of the car
A boy pulls a box of mass 30 kg with a force of 25 Nin a direction from left to right. What is the normal force exerted on the box by the ground
A non reflective coating (n = 1.34) covers the glass (n = 1.52) of a camera lens. find the minimum nonzero thickness that the coating can have
Calculate the peak output voltage of a simple generator whose square armature windings are 5.50 cm on a side
The bicycle alone has a mass of 10 kg. A person pushes the bicycle with a force of 75 N [N] at a constant speed. Recall Newton's first law of motion.
a 4.0 g string 0.39 m long is under tension. the string vibrates at 600 hz in the third harmonic. the wavelength of the
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