Answer:
40
Explanation:
Mechanical advantage = effort arm / load arm
MA = 20 cm / 0.5 cm
MA = 40
A. the medium
For refraction to occur, there has to be change from one medium to another. For example rays of light would refract as the travel from air to water.
Answer:because developed cities are more equipped to deal with raw sewage than less developed cities
Explanation:
The Correct Answer is <u>D.Infrared/</u> <em>INFARED has a lower frequency than visible light/</em>
Answer:
Microwave is used to heat the food and uses a different form of electromagnetic radiation. The form of electromagnetic radiation used in microwaves are radio waves and infrared radiation.
The frequency of such electromagnetic waves is 2,450 megahertz (2.45 gigahertz) and the wavelength range is approximately of 30 cm (frequency = 1 GHz) to 1 mm (300 GHz).
<u>Microwaves or electromagnetic radiation produced by a magnetron, an electron tube in the microwave. The cavity of the magnetron cavity magnetron produces electromagnetic waves defined wavelength. Electromagnetic radiation strikes within the metals in the microwave and is absorbed by food. Electromagnetic radiation allows the vibration of water molecules in the food and makes the food hot.</u>
