3 years ago

A radio wave wavelength is shorter than visible light. True or False.

2 answers:

6 0

False. Radio waves have much longer wavelengths and lower frequencies than visible light waves

Murrr4er [49]3 years ago

4 0

False. The radio wavelength is longer than the wavelength of visible light.

Hope this helps!

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A 750 watt hairdryer is used for 60 seconds. how many joules of energy are used?

daser333 [38]

We know, Power = Energy / time
Here, P = 750 Watt
t = 60 sec

Substitute their values,
750 = E / 60
E = 750 * 60
E = 45,000 J

In short, Your Answer would be 45,000 Joules

Hope this helps!

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An object is moving at a speed of 20 m/s and has a kinetic energy of 10,000 J. What is the mass of the object?

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