A square brass plate has large circular hole cut in its centre. If the plate is heated, it will expand. Will the diameter of the hole expand or contract? Explain your answer.​

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

If the new moon happens on january 15th, what shape will it be on february 6th?

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency