The troposphere contains 90% of the ozone in the atmosphere

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move

As you lift an 88 n box straight upward you produce a power of 72 w. what is the speed of the box?