8. Khaled has a red toy that is painted with a special kind of paint. When he puts the toy under a desk lamp, it stays red. When he puts the toy under an infrared lamp, it turns blue. Why does the infrared light cause the toy to turn blue when the light from the desk lamp does not

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.