7. when you are standing on a bridge, you are pushing down
on the bridge but you don't fall through (hopefullyl).
which law would this be an illustration of and why?

8. when shopping. it is much easier to push the empty shopping
cart than when it begins to fill up. which law would this
be an illustration of and why?

can anyone ?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Most of the volume of an atom is occupied by the