Questions from College Physics

Q: An underwater air bubble has an excess inside pressure of 10 Pa

An underwater air bubble has an excess inside pressure of 10 Pa. What is the excess pressure inside an air bubble with twice the radius?

Q: Four identical uniform metersticks are stacked on a table as shown.

Four identical uniform metersticks are stacked on a table as shown. Where is the x-coordinate of the CM of the metersticks if the origin is chosen at the left end of the lowest stick? Why does the sys...

Q: (a) Redo Example 8.7 to find an algebraic

(a) Redo Example 8.7 to find an algebraic solution for d in terms of M, m, μs, L, and θ. (b) Use this expression to show that placing the ladder at a larger angle θ (that is, more nearly vertical) en...

Q: Assume a water strider has a roughly circular foot of radius 0

Assume a water strider has a roughly circular foot of radius 0.02 mm. (a) What is the maximum possible upward force on the foot due to surface tension of the water? (b) What is the maximum mass of th...

Q: A person places his hand palm downward on a scale and pushes

A person places his hand palm downward on a scale and pushes down on the scale until it reads 96 N. The triceps muscle is responsible for this arm extension force. Find the force exerted by the tricep...

Q: A hollow hemispherical object is filled with air as in part (

A hollow hemispherical object is filled with air as in part (a) of the figure. (a) Show that the magnitude of the force due to fluid pressure on the curved surface of the hemisphere has magnitude F =...

Q: A block of mass m2 hangs from a rope. The rope

A block of mass m2 hangs from a rope. The rope wraps around a pulley of rotational inertia I and then attaches to a second block of mass m1, which sits on a frictionless table. What is the acceleratio...

Q: The frequency of vibration of a lithotriptor, an ultrasound generator used

The frequency of vibration of a lithotriptor, an ultrasound generator used to destroy kidney stones, is 1.0 MHz. (a) What is the period of vibration? (b) What is the angular frequency?

Q: A modern sculpture has a large horizontal spring, with a spring

A modern sculpture has a large horizontal spring, with a spring constant of 275 N/m, that is attached to a 53.0 kg piece of uniform metal at its end and holds the metal at an angle of 50.0°...

Q: A block of mass m1 slides to the right with coefficient of

A block of mass m1 slides to the right with coefficient of kinetic friction μk on a horizontal surface. The block is connected to a hanging block of mass m2 by a light cord that passes over a light, f...