All of the following statements are true of the water cycles except:
a. runoff occurs when excess water flows across the surface. this water can carry contaminants into rivers, lakes, and oceans.
b. water in reservoirs are used in households, industry, and agriculture. the largest reservoir is lake mead on the colorado river.
c. the oceans contain about 97.25% of all of the water on the planet.
d. once water vapor becomes liquid it will never be vapor again.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

What is the relationship between ozone and smog?