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Nataly_w [17]
2 years ago
9

Mary finishes a marathon at a speed of 2 m/s. If her

Physics
1 answer:
Snezhnost [94]2 years ago
5 0

Explanation:

v2 = v1 + at

v2 final speed

v1 initial speed

a acceleration

t time

2 = 0 + 4 a

a = 1/2

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Answer:

t=1.5\times 10^{-4}\ s

Explanation:

Given:

  • file size to be transmitted, D=30\ Mb
  • transmission rate of data, \dot D=10\ Mb.s^{-1}
  • propagation speed, v=2\times 10^8\ m.s^{-1}
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<u>Now the delay in data transfer from source to destination for each 10 Mb:</u>

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t'=\frac{10^4}{2\times 10^8}

t'=5\times 10^{-5}\ s

<u>Now this time is taken for each 10 Mb of data transfer and we have 30 Mb to transfer:</u>

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3 years ago
A speed-time graph is shown below:
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Answer:

<em>The average acceleration of the object is 0.5 cm/s^2</em>. Answer: A)

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<u>Average Acceleration</u>

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The speed-time shows the speed starts at 0 cm/s and ends at 4 cm/s over the 8 seconds period. The average acceleration is:

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B) Incorrect. The average acceleration is 0.5 cm/s^2

C) Incorrect. The average acceleration is 0.5 cm/s^2

D) Incorrect. The average acceleration is 0.5 cm/s^2

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