2. The element 4 X has how many protons?

Heat can only move one way. What way is that?

Which of Newton's laws of motion is demonstrated by a hammer pounding a nail into a board

A pair of narrow parallel slits are separated by a distance of 0.250 mm and illuminated by a green light with wavelength 5.461 x 10-4mm.

A guitar string is plucked and set into vibration. The vibrating string disturbs the surrounding air, resulting in a sound wave.

5. An electron is a particle with a negative charge, found outside the nucleus positive charge, found in the nucleus negative charge, found in the nucleus positive charge, found outside the nucleus

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?

If a glass is knocked off of a table that is 1.4m tall, how long does it take for the glass to hit the ground?

Imagine riding On a merry-go-round at the center. As you walk to the outer edge, the merry-go-round slows in order to conserve angular momentum. True or false?

17. (a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air (3.0*106 V/m) if the plates are separated by 2.00 mm and 5.

What property of sound enables us to distinguish one sound source from another?