Which example is a constructive process?

A. rivers carrying sediment down stream

B The rusting of a bridge

C waves cutting back a beach front

D volcanic eruption caused by plate tectonics

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.