A mixture is made up of two metals x and y. The mass of the mixture is 30 g and the volume of the mixture is 4.5 cubic centimetres. Determine the mass of metal x in the mixture.(density of metal x is 6000 kilograms per cubic metre and density of metal y is 7900 kilograms per cubic metre)

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.