Questions from College Physics

Q: A space station shaped like a giant wheel has a radius of

A space station shaped like a giant wheel has a radius of 100 m and a moment of inertia of 5.00 x 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the cre...

Q: A cylinder with moment of inertia I1 rotates with angular velocity ω0

A cylinder with moment of inertia I1 rotates with angular velocity ω0 about a frictionless vertical axle. A second cylinder, with moment of inertia I2, initially not rotating, drops onto th...

Q: A particle of mass 0.400 kg is attached to the

A particle of mass 0.400 kg is attached to the 100-cm mark of a meter stick of mass 0.100 kg. The meter stick rotates on a horizontal, frictionless table with an angular speed of 4.00 rad/s. Calculate...

Q: A typical propeller of a turbine used to generate electricity from the

A typical propeller of a turbine used to generate electricity from the wind consists of three blades as in Figure P8.75. Each blade has a length of L = 35 m and a mass of m = 420 kg. The propeller rot...

Q: If you quickly plunge a room-temperature mercury thermometer into very

If you quickly plunge a room-temperature mercury thermometer into very hot water, the mercury level will (a) Go up briefly before reaching a final reading, (b) Go down briefly before reaching a final...

Q: An 81.5-kg man stands on a horizontal surface

An 81.5-kg man stands on a horizontal surface. (a) What is the volume of the man’s body if his average density is 985 kg/m3? (b) What average pressure from his weight is exerted on the horizontal surf...

Q: Mercury is poured into a U-tube as shown in Figure

Mercury is poured into a U-tube as shown in Figure P9.10a. The left arm of the tube has cross-sectional area A1 of 10.0 cm2, and the right arm has a cross-sectional area A2 of 5.00 cm2. One hundred gr...

Q: The British gold sovereign coin is an alloy of gold and copper

The British gold sovereign coin is an alloy of gold and copper having a total mass of 7.988 g, and is 22-karat gold. (a) Find the mass of gold in the sovereign in kilograms using the fact that the num...

Q: The weight of Earth’s atmosphere exerts an average pressure of 1.

The weight of Earth’s atmosphere exerts an average pressure of 1.01 x 105 Pa on the ground at sea level. Use the definition of pressure to estimate the weight of Earth’s atmosphere by approximating Ea...

Q: Calculate the mass of a solid gold rectangular bar that has dimensions

Calculate the mass of a solid gold rectangular bar that has dimensions of 4.50 cm x 11.0 cm x 26.0 cm.