Which of the following would describe the interaction between two north poles of a magnet?

attract

repel

stay unchanged

it depends

What is Neons group and periodic number?

Explain Boyle's & Charles's law.

When a substance melts, is energy being added or removed?

How much heat is lost when 575 g of molten iron at 1825 K becomes solid at 1181 K and cools to 293 K?

An electric clock in a classroom will not run if it not plugged into an electric outlet what does the clock get from the electric current from the outlet? A) batteries B) chemicals C) energy D) time of day

When delta h is negative the reaction will be endothermic?

Why the atoms k2so4 bond

Whats the relationship between the temperature and the density of a substance

If you can smell a cleaning solution from across the room, you are experiencing the result of which liquid property? viscosity surface tension cleavage planes volatility

What is the effect of 1 mol dm-3 hydrochloric acid on a bulb? Explain why this effect happens.