Mrs. Mechinus wants to determine which type of ball has the highest bounce. She drops a tennis ball, soccer ball, then a basketball from a height of 15 feet, and measures & records how high each bounces back up. Identify the dependent and independent variables in this experiment. Use supporting details to explain why they are those variables.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot