Earth orbits the Sun because there is a Gravitational pull from the sun on the earth. The earth is pulled toward the sun, rather than going off in a straight line
Gravitational pull from the sun on the earth. The sun pulls the earth in the direction of the Earth’s orbital path
Gravitational push from the sun on the Earth. The sun pushes the Earth away so it does not crash into the sun
Strong magnetic interaction between the sun and the Earth. The gravitational interaction between the sun and the Earth is small

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

the dissolution of polymer can be thermodynamically described in 2 steps.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

the ratio of the conjugate base to the acid required to attain the desired ph.