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vladimir1956 [14]
3 years ago
7

How long would it take a 400 W motor to transfer 2000 J of energy 5s 50s 0.2s 0.02s

Physics
1 answer:
Vlad [161]3 years ago
4 0

Answer:

it's answer is 5 seconds,

Explanation:

Given

Power (p) = 400 watt

work (w) = 2000 J

time taken (t) = ?

we know that,

p = w/t

400 = 2000 / t

t = 2000/400

Therefore t = 5 sec

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Disabling asthma attacks can lead to restrictive school activity of approximately
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Answer:

<h2>Yes.</h2>

Explanation:

If we want to "disable" astham attacks, that would imply too many restictions for those people who can suffer from these attacks. For example, in order to avoid these attacks, they couldn't do sport activities, because that would alter their respiratory system, which occasionate astham attacks.

Therefore, this statement is true.

7 0
3 years ago
A hill is 132 m long and makes an angle of 12.0 degrees with the horizontal. As a 54 kg jogger runs up the hill, how much work d
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Answer:

14523.55J

Explanation:

The work done by the jogger against gravity is given by the following equation;

W=mgh.................(1)

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Since the length of the hill is 132m and it is inclined at 12 degrees to the horizontal, the height is thus given as follows;

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Substituting this into equation (1) with all other necessary parameters, we obtain the following;

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4 0
3 years ago
Compare positive and negative feedback mechanisms.
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Answer:

In positive feedback mechanism, the output is fed back to the system which further increases the output. Hence, it is known as positive feedback because it amplifies the output.

In the negative feedback mechanism, the output is fed back to the system which further decreases the the output. Hence, it is known as negative feedback because it reduces the output.

6 0
4 years ago
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What affect does doubling the net force have on the acceleration of the object (when
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<h3>Answer: The acceleration doubles</h3>

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

Explanation:

Consider a mass of 10 kg, so m = 10

Let's say we apply a net force of 20 newtons, so F = 20

The acceleration 'a' is...

F = ma

20 = 10a

20/10 = a

2 = a

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The acceleration is 2 m/s^2. Every second, the velocity increases by 10 m/s.

---------------

Now let's double the net force on the object

F = 20 goes to F = 40

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10a = 40

a = 40/10

a = 4

The acceleration has also doubled since earlier it was a = 2, but now it's a = 4.

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In summary, if you double the net force applied to the object, then the acceleration doubles as well.

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3 years ago
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Bone with a latticework structure is called
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Spongy or the cancellous bone is the bone with lattice work structure
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