Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence
of dark energy. Rank each model from left to right based on the ratio of its actual mass density to the critical density, from smallest ratio (mass density much smaller than critical density) to largest ratio (mass density much greater than critical density). (A) coasting universe
(B) critical universe
(C) recollapsing universe
The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time
