What is an hypothesis?

What best explains how two oxygen atoms, each with six valence electrons, can bond with each other?

Potassium Permanganate is used for purifying drinking water, because A. it is a sterilising agent B. it dissolves the impurities of water C. it is a reducing agent D. it is an oxidising agent

In which situations is heat flow present? Check all that apply. A substance feels warm. One substance does not have a temperature. Two substances have the same temperature. One substance transfers some of its thermal energy to another substance.

You move a 75-kg box 35 m. This requires a force of 90 N. how much work is done while moving the box?

The German V-2 rocket was the first man made object in space

Define the law of conservation of momentum in one sentence

A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of - 0.418m/s. How much time did it take? (unit=s)

Where does the energy of a nuclear power plant come from?

When the vapor pressure of a liquid is equal to the atmospheric pressure the liquid?

Both high-side pressures and low-side pressures are low with the engine running and the selector set to the air-conditioning position. Technician A says that the system is undercharged. Technician B says the cooling fan could be inoperative.