A train travels 77 kilometers in 1 hour, and the 66 kilometers in 1 hour. What is the average speed?

A cold air mass and warm air mass are next to each other, not moving. Which type of front occurs? occluded front stationary front warm front cold front

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s isJ.

Only a body at rest has inertia. - true - false

On cloudless nighs, heat escapes from our planet and goes into empty space A. conduction B. convection C. radiation

How much positive and negative charges is there in a cup of water?

If a ball is dropped from rest from an elevated position at the same instant that a second ball is launched horizontally (from the same height), then which ball will hit the ground first? Assume the balls behave as projectiles

What are 5 Non-Examples of Density

With the switch closed, how does the voltage across the 20-ω resistor compare to the voltage across the 10-ω resistor?

A 5.90-g lead bullet traveling at 410 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in

How do you scientists determine the number of neutrons in an isotope of an atom?