Questions from College Physics

Q: The vertical displacement d of light rays parallel to the axis of

The vertical displacement d of light rays parallel to the axis of a lens is measured as a function of the vertical displacement h of the incident ray from the principal axis as shown in part (a) of t...

Q: Two objects with the same surface area are inside an evacuated container

Two objects with the same surface area are inside an evacuated container. The walls of the container are kept at a constant temperature. Suppose one object absorbs a larger fraction of incident radiat...

Q: Even though heat is not a fluid, Eq. (14

Even though heat is not a fluid, Eq. (14-13) has a close analogy in Poiseuille's law, which describes the viscous flow of a fluid through a pipe (see Problem 9.68). (a) Explain the analogy. (b) For...

Q: A karate student hits downward on a stack of concrete blocks supported

A karate student hits downward on a stack of concrete blocks supported at both ends. A block breaks. Explain where it starts to break first, at the bottom or at the top. (The block experiences shear,...

Q: Why is the passenger's side mirror in many cars convex rather than

Why is the passenger's side mirror in many cars convex rather than plane or concave?

Q: For a capacitor in an ac circuit, explain why the current

For a capacitor in an ac circuit, explain why the current must be zero when the voltage across the capacitor is maximum.

Q: A hollow metal sphere carries a charge of 6.0 µC

A hollow metal sphere carries a charge of 6.0 µC. A second hollow metal sphere with a radius that is double the size of the first carries a charge of 18.0 µC. The two spheres are brought into contact...

Q: In a conventional exterior wall, a 2 × 6 wooden stud

In a conventional exterior wall, a 2 × 6 wooden stud is placed every 16 in. (A stud is an upright support.) The stud runs all the way from the exterior siding to the interior wall and the...

Q: Objects that are at rest relative to Earth’s surface are in circular

Objects that are at rest relative to Earth’s surface are in circular motion due to Earth’s rotation. (a) What is the radial acceleration of an object at the equator? (b) Is the object’s apparent wei...

Q: For human eyes, about 70% of the refraction occurs at

For human eyes, about 70% of the refraction occurs at the cornea; less than 25% occurs at the two surfaces of the lens. Why? [Hint: Consider the indices of refraction.] Is the same thing true for fish...