During the twentieth century, the study of the large-scale structure of the universe evolved from the theoretical to the practical; the field of physical cosmology was made possible and the better ability to observe extremely distant astronomical objects. (A) because of both Einstein's theory of relativity and
(B) by both Einstein's theory of relativity and
(C) by Einstein's theory of relativity and also
(D) because of Einstein's theory of relativity and also
(E) as a result of both Einstein's theory of relativity and

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

The dot diagram represents the motion of the motorcycle as it moves from left to right