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Tems11 [23]
2 years ago
4

A runner runs 4875 ft in 6.85 minutes. what is the runner’s average speed in miles per hour?

Physics
2 answers:
Gala2k [10]2 years ago
8 0

Answer:

The average speed of runner is 8.0849 \frac{ft}{h}.

Given:

Distance covered by runner = 4875 ft = 0.9233 miles

Time taken by runner to covered distance = 6.85 minutes = 0.1142 hour

To find:

The average speed of the runner = ?

Formula used:

Average speed of the runner is given by,

Average speed = \frac{Total distance}{Total time}

Average speed = \frac{0.9233}{0.1142}

Average speed = 8.0849 \frac{ft}{h}

The average speed of runner is 8.0849 \frac{ft}{h}.


MissTica2 years ago
7 0

Answer:

The average speed is 8.08 ft/h.

Explanation:

Given that,

Distance = 4875 ft = 0.9232955 miles

Time = 6.85 min = 0.1141667 hour

We need to calculate the average speed in miles per hour

The average speed is equal to the total distance divided by the total time

Using formula of distance

v=\dfrac{D}{T}

Where, D = total distance

v = average speed

T = total time

Put the value into the formula

v=\dfrac{0.9232955}{0.1141667}

v=8.08\ ft/h

Hence, The average speed is 8.08 ft/h.

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Explanation:

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If the intensity level by 15 identical engines in a garage is 100 dB, what is the intensity level generated by each one of these
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To develop this problem it is necessary to apply the concepts related to Sound Intensity.

By definition the intensity is given by the equation

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Where,

I = Intensity of Sound

I_0= Intensity of Reference

At this case we have that 15 engines produces 15 times the reference intensity, that is

I= 15I_0

And the total mutual intensity is 100 dB, so we should

\beta = 100-10*log(\frac{15I_0}{I_0})

\beta = 100-10*log(15)

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Moving water, like that of a river, carries sediment as it moves along its bed. The faster the water flows, the more sediment th
katovenus [111]

Correct option: A

An object remains at rest until a force acts on it.

As the water moves faster, it applies greater force on the sediment, which over comes the frictional forces between the bed and the sediment. So, when the river flows faster, more and larger sediment particles are carried away. When the flow slows down, the river couldn't apply enough force on the larger sediments which can overcome the frictional force between the sediment and the river bed. So, the net force on the heavier particles become zero. Hence, the heavier particles of the load will settle out.

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Explanation:

The component of the hydrologic cycle affected by impervious building such as concrete and asphalt is infiltration.

  • Water infiltration is a major component of the hydrologic cycle.
  • Concretes and other materials can prevent water from going down into the earth.
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