Questions from College Physics

Q: A constant net torque is applied to an object. Which one

A constant net torque is applied to an object. Which one of the following will not be constant? (a) Angular acceleration, (b) Angular velocity, (c) Moment of inertia, or (d) Center of gravity.

Q: Sucrose is allowed to diffuse along a 10.- cm length of

Sucrose is allowed to diffuse along a 10.- cm length of tubing filled with water. The tube is 6.0 cm2 in cross-sectional area. The diffusion coefficient is equal to 5.0 x 10-10 m2/s, and 8.0 x 10-14 k...

Q: Glycerin in water diffuses along a horizontal column that has a cross

Glycerin in water diffuses along a horizontal column that has a cross-sectional area of 2.0 cm2. The concentration gradient is 3.0 x 10-2 kg/m4, and the diffusion rate is found to be 5.7 x 10-15 kg/s....

Q: The viscous force on an oil drop is measured to be equal

The viscous force on an oil drop is measured to be equal to 3.0 x 10-13 N when the drop is falling through air with a speed of 4.5 x 10-4 m/s. If the radius of the drop is 2.5 x 10-6 m, what is the vi...

Q: Small spheres of diameter 1.00 mm fall through 20°

Small spheres of diameter 1.00 mm fall through 20°C water with a terminal speed of 1.10 cm/s. Calculate the density of the spheres.

Q: A 200.- kg load is hung on a wire of length

A 200.- kg load is hung on a wire of length 4.00 m, cross-sectional area 0.200 x 10–4 m2, and Young’s modulus 8.00 x 1010 N/m2. What is its increase in length?

Q: A 25.0-m long steel cable with a cross

A 25.0-m long steel cable with a cross-sectional area of 2.03 x 10-3 m2 is used to suspend a 3.50 x 103 -kg container. By how much will the cable stretch once bearing the load?

Q: A plank 2.00 cm thick and 15.0 cm

A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forc...

Q: Artificial diamonds can be made using high-pressure, high-

Artificial diamonds can be made using high-pressure, high-temperature presses. Suppose an artificial diamond of volume 1.00 x 10-6 m3 is formed under a pressure of 5.00 GPa. Find the change in its vol...

Q: For safety in climbing, a mountaineer uses a nylon rope that

For safety in climbing, a mountaineer uses a nylon rope that is 50. m long and 1.0 cm in diameter. When supporting a 90. -kg climber, the rope elongates 1.6 m. Find its Young’s modulus.