Truck A has a mass of 5000 kg and a velocity of + 5m/s. Explain why we say truck B has a velocity of - 5m/s.

What do scientists mean by the word Theory? A. An uncertain idea. B. An obsolete idea C. An idea which allows you to try to predict future events D. An idea which cannot be checked. so although it may sound convincing, we need to keep an open mind

Why is alternating current more effective at long-distance travel than direct current?

What metals were the alchemist trying to produce? did they succeed?

Magma that explodes from a volcano and solidifies in the air is called

Which best contrasts sublimation and vaporization

If all the humans in the world were crammed together, how much area would we require? compare that to a large city

Why might the cost of fossil fuels become more expensive in the future?

From the fact that virtually every galaxy is moving away from us and more distant galaxies are moving away from us at a faster rate than closer ones, we conclude that

A uniform electric field is oriented in the - z direction. The magnitude of the electric field is 6500 N/C.

1. A type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling is called a