PLS HELP ME ON THIS PLSSS 3) A horizontal 25 N force to the right is applied to a 4 kg box to push it
across a rough, horizontal floor. The friction between the floor and the box
is 8 N and there is negligible air resistance.
a) Find the weight of the box. Show all your work.
b) Draw the Free Body Diagram of this scenario. Make sure to label all
the forces completely.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.