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3 years ago

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Anyone good at science?

2 answers:

frozen [14]3 years ago

5 0

<span>In a transverse wave, the motion of the disturbance is "Parallel" to the wave motion.

In short, Your Answer would be Option B

Hope this helps!</span>

V125BC [204]3 years ago

5 0

Think about the definition of a transverse wave.

The answer is A.

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A 150 kg safe on frictionless casters is being raised at 1.20m to the bed of a truck using planks 4m long. The force needed to p

Vesnalui [34]

The only thing you need to know in order to solve this task is that <span>plank length (which is force x), should equal the increase in potential energy, so what we have now : (mass)* g * (height).
It has to look like that: </span>
<span>F * 3.0 = 150 x 9.81 x 1.20
Then solve for F, the result should be in newtones = 588N

Do hope it makes sense.</span>

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2 years ago

What effort force will be required to lift the 20 N object using the pulley above?

Umnica [9.8K]

Answer:

I think it is 5N.

Explanation:

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3 years ago

What is 178.57 rounded to the nearest whole number

postnew [5]

<h2><em>178.57</em></h2>

<h2><em>=</em><em> </em><em>178</em><em>.</em><em>6</em></h2>

<h2><em>=</em><em> </em><em>179</em></h2>

<h2><em>THANK</em><em> </em><em>YOU</em><em> </em></h2>

4 0

3 years ago

Read 2 more answers

If a sound wave travels through air at a speed of 345 m/s, what would be the frequency of a 0.80 m long wave?

den301095 [7]

Answer:

D

Explanation:431.3

7 0

3 years ago

A ball is dropped from a building taking 3sec to fall to the ground. Calculate:

GenaCL600 [577]

Answer:

Vf = 29.4 m/s

h = 44.1 m

Explanation:

Data:

Initial Velocity (Vo) = 0 m/s
Gravity (g) = 9.8 m/s²
Time (t) = 3 s
Final Velocity (Vf) = ?
Height (h) = ?

==================================================================

Final Velocity

Use formula:

Vf = g * t

Replace:

Vf = 9.8 m/s² * 3s

Multiply:

Vf = 29.4 m/s

==================================================================

Height

Use formula:

$\boxed{h=\frac{g*(t)^{2}}{2}}$

Replace:

$\boxed{h=\frac{9.8\frac{m}{s^{2}}*(3s)^{2}}{2}}$

Multiply time squared:

$\boxed{h=\frac{9.8\frac{m}{s^{2}}*9s^{2}}{2}}$

Simplify the s², and multiply in the numerator:

$\boxed{h=\frac{88.2m}{2}}$

It divides:

$\boxed{h=44.1\ m}$

What is the velocity when falling to the ground?

The final velocity is <u>29.4 meters per seconds.</u>

How high is the building?

The height of the building is <u>44.1 meters.</u>

3 0

2 years ago