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4 years ago

10

Calculate the speed of light if the wavelength is 3cm and the period is 1*10^-10

1 answer:

ioda4 years ago

6 0

First you find the frequency which is. 1/T(period) so u get 1*10^10
Now that you know frequency u can solve for speed: s= wavelength* frequency, but don't forget to convert 3cm into meters: 3/100= .03m so now you do (1*10^10)(.3)= 300,000,000 m/s or 3*10^8 m/s

Hope this helped :))

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kotykmax [81]

Answer:

The acceleration of the car is 5m/s²

Explanation:

Given data

Force F= 4,000N

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Acceleration a= ?

Applying the Newton's second law of motion which states that the rate of change of momentum of a body is proportional to the external force and takes place in the direction of the force

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4 years ago

In a 5000 m race, the athletes run 12 1/2 laps; each lap is 400 m.Kara runs the race at a constant pace and finishes in 17.9 min

Ksju [112]

Answer:

No. of laps of Hannah are 7 (approx).

Solution:

According to the question:

The total distance to be covered, D = 5000 m

The distance for each lap, x = 400 m

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Time taken by Hannah, $t_{H} = 15.3 min = 15.3\times 60 = 918 s$

Now, the speed of Kara and Hannah can be calculated respectively as:

$v_{K} = \frac{D}{t_{K}} = \frac{5000}{1074} = 4.65 m/s$

$v_{H} = \frac{D}{t_{H}} = \frac{5000}{918} = 5.45 m/s$

Time taken in each lap is given by:

$(v_{H} - v_{K})t = x$

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$t = \frac{400}{0.8}$

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So, Distance covered by Hannah in 't' sec is given by:

$d_{H} = v_{H}\times t$

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No. of laps taken by Hannah when she passes Kara:

$n_{H} = \frac{d_{H}}{x}$

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pav-90 [236]

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Next, let's calculate the density from the calculated area:

$\frac{N}{A} = \frac{1000}{2*10^{-15} } = 5*10^{17}$

In this way, the calculation represents that there is:

$5*10^{17} cells/cm^{2}$

Learn more: brainly.com/question/18320053

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