A room in the house has dimensions as 4 meters by 5 meters by 3 meters. Under normal condition (room temperature 25 degree Celsiusand atmospheric pressure), estimate the number of air molecules in the room. Hint: we went through a similar problem in the lecture.

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.