In looking at yourself in a steamy mirror you wipe just enough moisture away to barely see a full view of your face. If you move back from the mirror you’ll see

Because of refraction, the Sun near sunset appears

The part of the electromagnetic spectrum most absorbed by water is

Two charged particles near each other are released. As the particles move, the velocity of each increases. Therefore, the particles have

In a common dc circuit, electrons typically move at the speed of

When ice crystals form in clouds, the surrounding air

Your friend says that any radio wave travels appreciably faster than any sound wave.

Three resistors take the shape of a triangle, one resistor in each leg. Resistance in one leg is 4 ohms, in a second leg is 6 ohms, and third leg is 10 ohms. A measurement of resistance across the 10-ohm resistor will show the equivalent resistance to be

Which interacts more with sounds of relatively high frequencies?

In a gaseous mixture of hydrogen and oxygen, the faster molecules on average are