If two objects collide and stick together, what must increase? A. the acceleration due to gravity B. the friction between the two objects C. the force of gravity between the objects D. the two objects' momentum

Ms. hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up