By the time she managed/had managed to open the door, the postman already went/had already gone.

a truck drives up a hill with a 15 incline. if the truck has a constant speed of 22m/s, what are the horizontal and vertical components of the trucks velocity

Push a notebook or some other object so that it slides across a table or desktop. What force causes the notebook to start moving? What force causes the notebook to stop moving? If you don't know the name of the forces, just describe them.

True or false friction makes energy vanish

Whích best explains parallel forces?

A new electric car makes use of storage batteries as it source of energy. Its mass is 1300kg and it is powered 26 batteries, each 12v, 52 A-h.

A 200 g piece of iron is heated to 100°C. It is then dropped into water to bring its temperature down to 22°C. What is the amount of heat transferred to water? (ciron = 0.444 J/g°C)

What is the intermingling of one substance within another

What best describes the motion of the medium particles in a longitudinal wave?

If we decrease the distance an object moves we will

Inside a torque converter, the one-way clutch allows the stator to rotate only in one direction. Technician A says that it will turn in the same direction as the output shaft. Technician B says it turns in the same direction as the impeller.