Blog

Resonance can be viewed as forced vibration with the

You slowly rub your wet finger around the thin rim of a wine glass while you hold its base firmly to a tabletop with your other hand. The resulting sounds illustrates

A wave of 60 vibrations per second travels 30 m in 1 s. Its frequency is

Two charged particles 1 m apart exert a 1-N force on each other. If the particles are instead 0.25-m apart, the force on each particle will be

For a curved mirror, the law of reflection holds for

If a magnet produces a force on a current-carrying wire, the wire

Because of absorption, a Polaroid will actually transmit about 40% of incident nonpolarized light. Two Polaroids with their axes aligned will transmit

If sunlight were green instead of white, the most comfortable color to wear on a cold day would be

When a metal ring with a gap in the shape of the letter C is cooled, the gap becomes

An ideal transformer has 50 turns in its primary and 250 turns in its secondary. When 12-V ac is connected to the primary, the voltage available to the secondary is