Molecules that make up matter move constantly.Which of these forms of energy refers to the energy of the moving molecules and why?
A.Chemical Energy
B.Thermal Energy
C.Electrical Energy
D.Light Energy
Which device can change electrical energy to light and sound energy?
A.Speakers
B.Electric Lamp
C.Television
D.Fan
C?
1. B
2. B, A
Can you explain why for Question 1?
Thermal energy is generated and measured by heat of any kind. It is caused by the increased activity or velocity of molecules in a substance, which in turn causes temperature to rise accordingly.
The form of energy that refers to the energy of moving molecules is called Thermal Energy. This is because thermal energy is the energy transferred between objects or systems due to the temperature difference. When molecules move, they transfer this thermal energy to other particles, resulting in the overall increase in temperature of the substance.
Now, let's move on to the second question. The device that can change electrical energy to light and sound energy is an Electric Lamp. Electric lamps, such as incandescent bulbs or LED lights, convert electrical energy into light energy by passing an electric current through a filament or semiconductor, which then emits visible light. Some electric lamps also have built-in speakers that can produce sound, but their primary function is to convert electrical energy into light energy. So, the correct answer is B. Electric Lamp.