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2 years ago

15

Hurryyyyy plzzzzzz..........the one in the middle...

1 answer:

zheka24 [161]2 years ago

5 0

Answer:

Friction force is independent of the direction of the contacting surfaces

Explanation:

It can go any way depending on how much force is being out on it.

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Which of these is an example of acceleration ?

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2 years ago

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local AM radio station broadcasts at a frequency of 685.9 kHz. Calculate the wavelength at which they are broadcasting. Waveleng

natta225 [31]

Answer:

λ = 437 m.

Explanation:

Since a radio wave is a electromagnetic type of wave, it propagates approximately at the same speed of light in vacuum, 3*10⁸ m/s.
As in any wave, there exist a fixed relationship between the propagation speed, the wavelength and the frequency of the radio wave, as follows:

$c = \lambda* f (1)$

Replacing by the values of the speed and the frequency, and solving for the wavelength λ, we get:

$\lambda = \frac{c}{f} =\frac{3e8 m/s}{685.9e31/s} =437 m (2)$

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1 year ago

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agasfer [191]

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2 years ago

PLEASE HELP ME!! What is the difference between direct current and alternating current?

Paha777 [63]

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