PLEASE HELP ME ASAP Which of the following is an example of an opposing force?
A
Gravity pulling a ball down a hill
B
Wind blowing a leaf off of a tree
с
Gravity holding a rock still on the ground
D
Water pushing against someone as they wade through a pool

Is this a single replacement reaction or there is no

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added