When NaH combines with water, OH - ions are produced. This shows that NaH is an acid.

The strength of gravitational force is affected by the mass of objects and which of the following?

Which of the following is NOT a physical mechanism that causes air to rise? A) orographic liftingB) frontal wedging C) adiabatic coolingD) convergence

Table salt (NaCl) dissolves in water. What happens when saltwater is made? A) The salt crystals sink to the bottom of the water. B) The salt crystals split into ions. C) The salt crystals float to the top of the water.

What usually happens to the host's DNA during the lytic cycle?

A runner starts from rest and has an acceleration of 3 m/s2. How fast is she running after 1.1 seconds

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.