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vladimir2022 [97]
3 years ago
8

a light wave travels at 3.0 x 10^8 m/s. if the wavelength of a red wave is 700 x 10^-9m, what is the frequency?

Physics
1 answer:
asambeis [7]3 years ago
3 0

Frequency  =  (speed) divided by (wavelength)

                 = (3 x 10⁸ m/s)  /  (700 x 10⁻⁹ m)

                 =  (3 / 700) x 10¹⁷ ( per sec )

                 =    4.286 x 10¹⁴  per sec  =  4.286 x 10¹⁴ Hz.

                                                           =      42,860 GHz .

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It should be noted that wave speed simply means the distance that a wave travels during a particular time.

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nikitadnepr [17]

The time spent in the air by the ball at the given momentum is 6.43 s.

The given parameters;

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The impulse experienced by the ball is calculated as follows;

Ft = \Delta P

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Ft is impulse

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The time of motion of the ball is calculated as follows;

t = \frac{\Delta P}{F} \\\\t = \frac{0.9 - 0}{0.14} \\\\t = 6.43 \ s

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a ball is thrown striaght up in the air and then falls back to earth. if the downward fall takes 2.2s, how fast is the ball trav
lapo4ka [179]

The velocity of the ball when it strikes the ground, given the data is 21.56 m/s

<h3>Data obtained from the question</h3>

From the question given above, the following data were obtained:

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The velocity of the ball when it strikes the ground can be obtained as illustrated below:

v = u + gt

v = 0 + (9.8 × 2.2)

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v = 21.56 m/s

Thus, the velocity of the ball when it strikes the ground is 21.56 m/s

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Answer:

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