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3 years ago

14

you throw a rock with a horizontal velocity at 36.6 m/s out a window that is 29.5 m above the ground. What was it’s total time i

n the air?

1 answer:

ANEK [815]3 years ago

4 0

29.5-4.9x^2= your answer

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A runner circles the track exactly 2 times for distance of 800m. it takes 4.0min. what is her average speed in m/s? what is her

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4 years ago

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3 years ago

an object is 50 cm to the left and an image is 50 cm to the right of a convex lens. What is the focal length?

Andrew [12]

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Explanation:

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3 years ago

What are the wavelengths of electromagnetic wave in free space that have the following frequencies?

Ne4ueva [31]

Explanation:

Given that,

(a) Frequency, $f_1=4\times 10^{19}\ Hz$

All electromagnetic wave moves with the speed of light. It is given by :

$c=f\lambda$

$\lambda_1=\dfrac{c}{f_1}\\\\\lambda_1=\dfrac{3\times 10^8}{4\times 10^{19}}\\\\\lambda_1=7.5\times 10^{-12}$

(b) Frequency, $f_2=5.5\times 10^{1=9}\ Hz$

All electromagnetic wave moves with the speed of light. It is given by :

$c=f\lambda$

$\lambda_2=\dfrac{c}{f_2}\\\\\lambda_2=\dfrac{3\times 10^8}{5.5\times 10^{9}}\\\\\lambda_2=0.054\ m$

Hence, this is the required solution.

7 0

3 years ago