19: 04
as a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box
and floor become warm during this process, energy is

As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box and floor become warm during this process, energy is conserved.

Explanation:

This process happens because of conservation of energy. According to the rule of the conservation of energy. Energy can’t be created not destroyed. It simply transformed or converted from one form to another. It simply means this system always need same amount of energy.

When a person moving arm is to transferred into box is form of kinetic energy and on the same way when then floor and box becomes warmer it converts into heat energy. Here the energy transformed into one to another form.  

answer; /// i believe the name your looking for is called (plaque)or check good luck

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.