Magnesium has 12 protons in its nucleus.

which is the atomic number of magnesium?

a. 24

b. 6

c. 12

Which of the following types of weather data is measured as a percentage?. A] air pressure. B] precipitation. C] relative humidity. D] wind speed

A train is traveling at a speed of 75km/hr. The brakes are applied to produce a uniform acceleration of - 0.5 m/s2. Find how far the train goes before it stops?

Which phrase best describes wave motion? O A. movement of energy through space or a medium OB. movement of matter through space C. movement of energy within a particle OD. movement of air molecules through a medium

A cue ball initially moving at 2.5 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball's final speed is 1.2 m/s at an angle of? With respect to its original line of motion.

When less saline water enters a marginal sea above a return flow of saltier water, the circulation pattern is called:?

Which of the following statements about Em waves is true? A. Em waves all have the same speed B. Em waves all have the same wavelength C. Em waves only travel through water D. Em waves all have the same amount of energy

A teacher has asked four students to state a scientific theory. Which student is correct?

What are the two main currents that affect the US on the east and west coast?

What role do volcanoes play in the flow of energy and cycling of matter on earth?

How does uniform linear motion differ from uniform circular motion?