A train travels 79 kilometers in 2 hours, and then 77 kilometers in 3 hours. What is its average speed?

Answers? and Units?

Electrical current is directly proportional to which of the following quantities? potential resistance capacitance power

A 2-meter high wave with a wavelength of 100 meters and period of 20 seconds would be moving how fast?

In a shuffleboard game, the puck slides a total of 12 m on a horizontal surface before coming to rest. if the coefficient of kinetic friction between the puck and board is 0.10, what was the initial speed of the puck?

Which element is the most prevalent in the human body? nitrogen hydrogen carbon oxygen

Fossils found in lower rock layers are generally more what than fossils found in rock layers closer to the surface

What happens if you don't wear your school uniform?

Velocity is the rate at which an object moves in a certain direction. what would cause a change in velocity?

The position of an object is given by x = at3 - bt2 + ct, where a = 4.1 m/s3, b = 2.2 m/s2, c = 1.7 m/s, and x and t are in SI units. What is the instantaneous acceleration of the object when t = 4.1 s?

A 0.25 kg baseball is in contact with a bat for 0.0075 s and exerts a force of 18,500 N. What impulse is delivered to the ball?

What is the American psychology Association ethical principle of psychology and code of conduct based upon