What are the two most important processes in the cycling of oxygen in and out of the atmosphere?

a. weathering and erosion

b. evaporation and precipitation

c. photosynthesis and respiration

d. lightning fixation and fossil fuel emission

Common units of measurement for speed.

What is the name of the process that puts adp and phosphate together to form atp

Which of the following statements is true? A. In an endothermic reaction, the energy of the products is the same as the energy of the reactants. B. In an endothermic reaction, the energy of the products is less than the energy of the reactants. C.

Which type of central heating system involves fans and ducts to circulate warm air?

If gravity is not a force how does it accelerate objects?

A 0.60 Kilo gram basketball poses on the rim of a basketball hoop that is 3.0 m high find the potential energy of the ball there (use G=10 N/KG.)

2. What was the role of women as industry increased? A. They gained the vote, B. They became industry leaders, e. They led the household D. They can for government office,

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?

Does temperature affect the dissolving phase?