Which of the following trials must have two objects colliding that are the same mass note: linear collision with frictionless surface

i think the answer is a, hope this is right, that would be my best guess.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this