Can someone me with this question bart ran 5000 meters from the cops and an average speed (velocity) of 6 meters/second before he got caught. how long did he run?

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

You can decrease the resistance of a length of wire by

What caused magnetic fields? what happens if you keep breaking a magnet in two until you reach a single atom?