A train travels 57 kilometers in 3 hours, and then 87 kilometers in 2 hours. What is its average speed? km/hr

A solid sphere has a temperature of 556 K. The sphere is melted down and recast into a cube that has the same emissivity and emits the same radiant power as the sphere. What is the cube's temperature in kelvins

Marcus drove his Honda Prelude for 4 hours at a rate of 55 miles per hour. How far did he travel?

Explain why a soda can feel cold when you take it out of the refrigerator.

The european council is the political wing of what international organization. True or False

What is a hypothesis answer sentence for a lemon battery experiment

A series of steps that allows someone to conduct an experiment are called a

A coach is hitting pop flies to the outfielders. if the baseball (m = 145 g) stays in contact with the bat for 0.04 s and leaves the bat with a speed of 50 m/s, what is the average force acting on the ball?

The two major ways to transfer charge between two objects are

When a wire loop is connected to a battery, what is produced in the loop?

A solid sphere of radius R has a total charge Q distributed evenly throughout its volume. What fraction of the total charge is located inside a radius R/2?