Astudent solving for the acceleration of an object has applied appropriate physics principles and obtained the expression a=a1+fm where a1=3.00 m/s^2, f=12.0kg. m/s^2 and m=7.00kg. (a) first, which of the following is the correct step for obtaining a common denominator for the two fractions in the expression in solving for a? finding acceleration.

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? ?

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?