Why is fresh water a limited resource? A) Groundwater is too difficult to access.

B) The supply of water on Earth decreases over time.

C) Too much water is wasted on irrigation.

D) Most water covering Earth is salt water.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

An object with a mass of 1.5 kg changes its velocity from + 15 m/s to +22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the objects?

How many astronauts have walked on the moon?