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3 years ago

1 point How much force is needed to accelerate an 84-kg boulder at a rate of 6.4 m/s/s? *

Physics

1 answer:

Katen [24]3 years ago

5 0

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 84 × 6.4

We have the final answer as

Hope this helps you

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A very powerful vacuum cleaner has a hose 2.36 cm in diameter. With no nozzle on the hose (no change to hose area), what is the

FinnZ [79.3K]

Answer:

Explanation:

Pressure=Force/Area

Force=Pressure * Area

$Force=1.013\times 10^5 \times 3.14\times (1.03\times 10^{-2})^2\\\\=33.7N$

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3 years ago

True or false<br> Hydrogen fuel cells generate electricity by combining hydrogen with oxygen.

adoni [48]

Answer:

The answer is: True.

Explanation:

If free electrons or other substances could travel through the electrolyte, they would disrupt the chemical reaction. Whether they combine at anode or cathode, together hydrogen and oxygen form water, which drains from the cell. As long as a fuel cell is supplied with hydrogen and oxygen, it will generate electricity.

(Credit: Google)

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3 years ago

An 82 g arrow is fired from a bow whose string exerts an average force of 95 n on the arrow over a distance of 77 cm. what is th

Zigmanuir [339]

You need to find speed, v.
And you (should) recognize the famous F=ma.

We've got data for F and m, so we can find a first!
$a = \frac{f}{m}$
a = 95N / 0.082 kg

Now from a we nees to find v. But how is v and a related?
$a = v \times \frac{dv}{dx}$
where dv is the change in speed (some unknown v minus zero since arrow is initially at rest). dx is the distance where the arrow experiences a force (77 cm!).

Now you know values for a, dv, and dx... you can plug those in and find v!

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3 years ago

Provided the amplitude is sufficiently great, the human ear can respond to longitudinal waves over a range of frequencies from a

riadik2000 [5.3K]

Answer:

Check the explanation

Explanation:

The beat frequency is

df = f2 - f1

the wavelength is

lamda1 = (v/f1)

and lamda2 = (v/f2)

where v = 340 m/s,f1 = 25.0 kHz and f2 = 20.0 kHz

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3 years ago

The atmosphere has many roles, including:

monitta

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