If I increase the decibel level of a sound source from 30 to 50 decibels, its intensity increases by a factor of

In an electrically neutral atom the number of protons residing in the nucleus is equal to the number of

A 20 meter long wave travels 80 m in 1 second. Its frequency is

Which wave is the slowest to reach you from a source?

The most energetic form of electromagnetic radiation (light) is

The cardboard ice cream box in the freezer doesn’t feel as cold to you as the aluminum ice tray in the freezer because

I spin my son on the merry-go-round at the playground. When he walks inward towards the center of the merry-go-round, the rotational inertia of the system will_____.

When the distance between two charges is tripled, the electrical force between the charges

Two objects rotate on a merry-go-round, one at r=1 m and the other at r=2m from the center. The object rotating at 1 m has less _______than the object at 2 m.

An electric heater is rated at 400 watts when used in a 110 V circuit. The safety fuse can handle 12 amps of current. How many heaters can be safely operated in the circuit?