if chlorine has a mass of 35.5 atomic mass units and a sodium atom has a mass of 23.0 atomic mass units, what is the mass of one NaCI unit?

How far can light travel in one year?

Some shrimp and crab live and capture food from within the tentacles of giant anemones

How do you the tilt of earth on its axis might affect life in the polar regions?

You get to the dive site, put on your gear, and are ready to go under. You check your scuba tank. It is filled to a pressure of about 22,000 kPa (kilopascals) at a temperature of 300 K. The volume of the tank is 25 L.

Which of the following would not produce a magnetic field

Technician A says that engine parts should be be cleaned before a thorough test can be done to detect cracks. Technician B says that pressure testing can be used to find cracks in blocks or cylinder heads. Who is right?

How are mathematics and science related?

Radio telescopes detect waves with a wavelength of roughly 10 m. True False

2. A 0.30 kg ball is dropped onto a concrete driveway. The ball's velocity before impact is 4.5 m/s and after impact is 4.2 m/s. What is the change in the ball's momentum?

If we start with 400 atoms of a radioactive substance, how many would remain after one half-life? After 2 half-lives? After 3 half-lives? After 4 half-lives?