Which of the following processes add methane (CH4) to the atmosphere?

A. Breakdown of plant and animal remains in the soil.

B. Leakage from natural gas pipelines.

C. Food digestion by land animals.

D. All of the above.

1. What is the most "familiar" use of silicon today?

What does m represent in the equation m = M + 5 log (d/10)

A proton of mass m moving with a speed of 3.0 * 106 m/s undergoes a head on elastic collision with an alpha particle of mass 4m at rest. What are the velocities of the two particles after the collision?

In a rock climbing gymnasium a climber with a wt = 125 lbs is climbing vertically for a distance of s = 25 ft with a constant velocity. It takes her t = 3 min to climb up the wall. a) What is the work done by the climber? (2 pts.

What is the source of the input energy for the cogeneration of energy?

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron near the surface of the earth? express your answer to two significant figures and include the appropriate units.

Minerals are considered to be Answer made out of rocks the building blocks of rocks extremely rare and valuable difficult to find

the solubility product of lead fluoride is 3.6 x 10-8. what is its solubility in 0.10M NaF solution, in grams per liter

A passenger on a bus moving east sees a man standing on a curb. from the passenger's perspective, the man appears to

Which of the following is the best example of a proper hypothesis? Water will flow faster through tightly packed soil than through loosely packed soil. I think there is no effect on hearing if you listen to loud music for only three hours a day.