The answer would be D) Kinetic friction because kinetic means during and in motion and happening/occurring so since the box is moving now across the floor, its in motion so that's why its D).
The frequency of the signal is
Explanation:
The relationship between wavelength, speed and frequency of an electromagnetic wave is
where
is the speed of light
f is the frequency of the wave
is the wavelength
For the radio wave in this problem,
is the wavelength
So we can rewrite the equation to find the frequency:
Learn more about waves, frequency and wavelength:
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- 1000 mph is the speed of an airplane,
- 100 mph is the speed of a sport car.
- 1 mph is the walking speed.
Answer: The best estimate for the speed of a boy going fast on the skateboard is B ) 1 mph.
1. False
2.False
3.False
4.True
5. True
6. False
7.True
8.False
9. True
10. False