20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from
25° C to 20° C, how much heat energy (Q) moves from the water to the
surroundings?
418 Joules
4.18 J
209 J
83 J

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.