If a magnet repels a metal object what can you say about the pole of the magnet and the pole of the object?

a. the poles are opposite.
b. the poles change.
c. the poles are not charged.
d. the poles are the same.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Calculate the work done by an external agent during an isothermal compression of 1.00 mol of oxygen from a volume of 22.4 l at 10∘c and 1.0 atm pressure to 16.8l

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.