What is the wavelength of radio waves? which statement is true for a cooling curve? a. it shows how the temperature of the substance falls as heat is removed. b. it shows how the temperature of the substance changes when heat is applied. c. it shows the increase in the average kinetic energy of the particles. d. it shows how heat absorption affects the motion of particles. e. it shows how energy gain causes the temperature to fall.

Most radio waves have wavelengths between 1 mm and 100 km.

A cooling curve shows A. how the temperature of a substance falls as heat is removed.

Explanation:

Radio waves are the longest of all the waves in the electromagnetic spectrum.

Most have wavelengths between 1 mm and 100 km, although there is no upper limit.

Some radio waves have wavelengths of 10 000 km.

A cooling curve (see image below) shows how the temperature of a substance falls as it is cooled.

In Option E., a decrease in temperature would cause an energy loss.

Options B., C., and D. involve the addition of heat.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.