The frequency is 
and it is blue light
Explanation:
The relationship between the speed, the frequency and the wavelength of an electromagnetic wave is given by:
where
is the speed of light
f is the frequency of the wave
is its wavelength
In this problem, the wavelength of the wave is
Therefore, its frequency is:
The wavelength of this wave is
And by looking at the table of the wavelengths of the colors, we notice that this corresponds to the blue light, which has a range of wavelength of
[450 - 495] nm
Learn more about waves and electromagnetic waves here:
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Answer:
0.04s
Explanation:
Specific heat of water c = 4.186J/g.C
The heat energy it would take to heat up 0.5 kg of water from 30C to 72 C is
If the power of the electric kettle is 2.2kW (or 2200W) and suppose the work efficiency is 100%, then the time it takes to transfer that power is
Answer:0.003 amperes
Explanation:
Quantity of charge=0.009
Time=3.5seconds
current=quantity of charge ➗ time
Current=0.009 ➗ 3.5
Current=0.003 amperes
Answer:
A divide is the elevated boundary separating areas that are drained by different river systems
Explanation:
Answer:
Flexibility! :)
Explanation:
Agility: The ability to rapidly and accurately change the direction of the body. It is important in sports such as tennis which requires players to change direction quickly to hit the ball.
Flexibility: The muscles’ ability to move a joint through a full range of motion, and staying flexible is important to health and performance. As the body ages, the muscles, tendons, and ligaments stiffen, lose elasticity, and become less flexible.
Power: The ability to move the body parts swiftly while applying the maximum force of the muscles.
Body Composition: The combination of fat mass and fat-free mass, including bones, muscles, organs, and water.
