Why there are electric vehicles in the world

If an element has 7 electrons how many will be in the 2nd energetic level

Define impulse A) an objects resistance to change B) an object's change in momentum C) an object that does not move D) when an object guesses correctly

Four beats per second are heard when an unknown tuning fork and a 240 Hz tuning fork are struck simultaneously. This same unknown tuning fork and a 250 Hz tuning fork are struck. Six beats are heard. Its exact frequency?

9. What do you think would happen if your balloon had twice the mass when you launched it? Answer the question using Newton's First and Second Laws.

If you encounter this red marker buoy when heading in the upstream direction (returning from sea), how should you proceed?

If an ice cube melts at 0°C but water freezes at 0°C what is the difference between melting and freezing in terms of energy involved with phase changes and be particles of substances during the phase changes?

Why do the upper levels of Neptune's atmosphere appear blue?

An athlete has a mass of 62 kg and a volume of 65 liters. What is the density is kg/l?

A wave has a speed of 50m/sec if its frequency is 100 hz what's it's wavelength

11. A depression in the ground due to a cave collapse or acidic water dissolution of limestone is called a A. sinkhole. B. stalagmite. C. stalactite. D. cave.