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

Answers? and Units?

Explain how scientific knowledge develops through making observations about the natural world

What is the basic functions of the blood in the cardiovascular system

If we decrease the distance an object moves we will decrease the amount of work done. increase the amount of force applied. increase the amount of work done.

An infrared spectrometer on Dawn found something unexpected on Ceres's surface. Its presence suggested that Ceres might have formed farther from the Sun, or been impacted by objects from a more-distant part of the solar system. What was this finding

A chandelier has sockets for 12 light bulbs. Suppose there are 75 of these chandeliers in an auditorium. If a box of light bulbs contains four bulbs, what is the minimum number of boxes needed to fill all of the sockets in all of the chandeliers?

Why do scientist use radioactive decay to figure out how old stuff is

The power of a machine measures A. its rate of doing work. B. its strength. C. the force it produces. D. the work it does.

the acceleration of gravity is 28 times on sun than earth. Imagine there is a space suit that let you stand on sun. Calculate the weight of 100 kg person on earth in newtons

A force of 20 n acts upon a 5 kg block, calculate acceleration of the object

What resultant force is needed to accelerate a train of mass 3.41000000 kg from rest to 15.0ms in exactly 20s