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3 years ago

9

Why is air considered a fluid

2 answers:

sdas [7]3 years ago

7 0

Answer:

Because air is made of air particles, that are loosely held together in a gas form.

Explanation:

34kurt3 years ago

6 0

Answer:

A fluids is any substance that flows. Air is made of stuff, air particles, that are loosely held together in a gas form. Although liquids are the most commonly recognized fluids, gasses are also fluids. Since air is a gas, it flows and takes the form of its container.

Explanation:

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A 65.0 kg diver is 4.90 m above the water, falling at speed of 6.40 m/s. Calculate her kinetic energy as she hits the water. (Ne

mojhsa [17]

Answer:

4452.5 J.

Explanation:

The diver have both kinetic and potential energy.

Ek = 1/2mv² ................. Equation 1

Where Ek = Kinetic Energy of the diver, m = mass of the diver, v = velocity of the diver.

Given: m = 65 kg, v = 6.4 m/s.

Substitute into equation 1

Ek = 1/2(65)(6.4²)

Ek = 1331.2 J.

Also,

Ep = mgh ............................ Equation 2

Where Ep = Potential energy of the diver when its above the water, h = height of the diver above the water, g = acceleration due to gravity.

Given: m = 65 kg, h = 4.9 m, g = 9.8 m/s²

Substitute into equation 2.

Ep = 65(4.9)(9.8)

Ep = 3121.3 J.

Note: When she hits the water, the potential energy is converted to kinetic energy.

E = Ek+Ep

Where E = Kinetic energy of the diver when she hits the water.

E = 1331.2+3121.3

E = 4452.5 J.

3 0

3 years ago

Which of the following is true about "natural" steroids?

crimeas [40]

Answer:

The answer is C

Explanation:

5 0

4 years ago

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vladimir2022 [97]

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4 years ago

A rope is vibrating in such a manner that three equal-length segments are found to be vibrating up and down with 321 complete cy

kolbaska11 [484]

Answer:

<u>2.48 m</u> is the length of the rope.

Explanation:

Cycle period is 321

Time is 20 second

Wave travels at speeds = 26.4 m/s

We know that,

$\text { Frequency }=\frac{1}{T} \text { (For one cycle) }$

Frequency required for 321 complete cycle in 20 seconds is

$\text { Frequency }(f)=\frac{321}{20}$

Frequency = 16.05 hz

We know that,

$\text { Wavelength }=\frac{\text { wave velocity }}{\text { frequency }}$

$\lambda=\frac{v}{f}$

λ = wavelength, the distance between "wave crests" (m)

v = wave velocity, the "speed" that waves are moving in a direction (m/s)

f = frequency, (cycles/ or Hz)

$\lambda=\frac{26,4}{16.05}$

λ = 1.65 m

As per given question "length of the rope has three equal length segment"

$\mathrm{Length of the rope}=\frac{3}{2} \lambda$

$\mathrm{Length of the rope }=\frac{3}{2} \times 1.65$

$\mathrm{Length of the rope}=1.5 \times 1.65$

Length of the rope = 2.48 m

Therefore, length of the rope is <u>2.48 m.</u>

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3 years ago

How do you determine the standard error on the slope in a simple harmonic motion graph

elena-14-01-66 [18.8K]

Answer:

by standing on the top of cliff

5 0

3 years ago