Which statement is true about a proton and a neutron? 1) they have the same masses and different charges 2)they have the same masses and different charges 3) they have different masses and the same charge 4) they have different masses and different charges

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.