A farm tractor tows a 3300-kg trailer up a 14" incline with a steady speed of 2.8 m/s. what force does the tractor exert on the trailer (ignore friction.)

Count Rumford concluded that heat energy is produced by

A jeweler working with a heated 47 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99ºC, what mass of water at 25ºC is needed to lower the ring's temperature to 38ºC? 5.9 g 3.7 g 2.2 g 6.8 g

Which part of the electromagnetic spectrum has a lower frequency than visible light? x-rays infrared gamma rays ultraviolet

Which would be most useful in trying to obtain procedural information to replicate an experiment previously published? 1. Dictionary 2. Encyclopidia 3. Internet Search Engine 4. Peer-reviewed Journal Article

A period of abnormally high emotion and activity is called?

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

Which of the following is not the name of a space station that was in orbit around Earth?

Relationship between acceleration and free fall