Name two ways humans use sound other than hearing and an example of each

The drawing shows two planes each dropping an empty fuel tank. At the moment of release each plane has the same speed of 140 m/s, and each tank is at the same height of 3.98 km above the ground.

If 12 atoms of hydrogen enter into a chemical reaction how many atoms of hydrogen must come out of this reaction

Juan aims his boat directly across a river flowing at 8mi/hr. juan's boat travels at 6 miles/hr in still water. how was does juan travel relative to shore

Explain why air masses do not mix

Work requires a force which causes: Potential energy or motion

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.