Which metals is mostly likely to form more than one kind of positively charged ion a sodium b barium c nickel d magnesium

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply