Which object has the most thermal energy? ) A. 5 kg of oxygen gas at 30°C B. 2 kg of oxygen gas at 20°C O O O O C. 5 kg of liquid oxygen at -220°C O D. 2 kg of liquid oxygen at -225°C​

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Which accurately compares concave and convex lenses?