If a wave has a frequency of 5 Hz, what is its period?

If we have a one-electron atom, and the electron can occupy any of 5 different energy levels, and transitions are possible between any level and any other, how many lines might appear in that atom's spectrum?

Which statement is true about crystal lattice energy? It increases as the size of the ions increases. It increases as the charge on the ions decreases. It is the energy that ions absorb when they form a crystal.

An automobile traveling at 25.0 km/h along a straight, level road accelerates to 65.0 km/h in 6.00 s. what is the magnitude of the auto's average acceleration?

What is the average acceleration of a car that is initially at rest at a stoplight and then accelerates to 24 m/s in 9.4 s? A. 0.39 m/s2 B. 2.6 m/s2 C. 5.2 m/s2 D. 8.2 m/s2

Car A is parked on a hill and Car B is driving down a level highway. Which statement best describes the two cars? A) Car A has kinetic energy and Car B has kinetic energy. B) Car A has potential energy and Car B has kinetic energy.

What part of an egg is most similar to the cell membrane

How many seconds are there in the month of March

What is a neoplasm? A. Another word for a malignant tumor B. A type of carcinoma that grows only in the mouth C. A benign swelling of epithelial cells D. Any new and abnormal growth

4. Why isn't full employment the same as zero unemploy- ment?

A claw hammer is used to pull a nail from a piece of wood. Where should you place your hand on the handle and where should the nail be located in the claw to make the effort force as small as possible?