Which of these formulas represents 1 atom of sodium (Na) chemically combined with another element?

A. PbS

B. NaCl

C. 2NaOH

D. Na2H3IO6

When temperature increases, all BUT ONE of the following increases as well. That is A) wavelength. B) heat energy. C) kinetic energy. D) molecular motion.

Nan moved 18m to the right and then another 22m to the right if the motion takes 20 seconds what is nans velocity

10. A sound wave has a frequency of 400 Hz and a wavelength of 20 meters. What is the speed?

Why ae the bricks more dense than feathers

If the period of a pendulum is 4.0 s, what is it's fequency?

A bathroom scale is compressed 0.21 in. when a 210 -lb person stands on it. Assuming that the scale behaves like a spring that obeys Hooke's law, how much does someone who compresses the scale 0.06 in.

Explain what happens when a ferromagnetic material is made into a permanent magnet.

You are drawing a branching diagram to show the relationship between Turtles frogs and alligators which two organisms does the diagram indicateas having the most recent common ancestor

Estimate the length of the neptunian year using the fact that the earth is 1.50Ã108km from the sun on average.

Identify one type of electromagnetic energy that has a shorter wave length than green light