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Andre45 [30]
3 years ago
15

A paper airplane is thrown westward at a rate of 6 m/s. The wind is blowing at 8 m/s towards the north. Which of the following d

iagrams best illustrates the actual path of the airplane?

Physics
1 answer:
Andrew [12]3 years ago
5 0

since airplane is thrown towards west with speed 6 m/s

while air is blowing with speed 8 m/s towards north

so here the net speed of air plane will be the resultant of airplane speed and wind speed always

SO here we can say it would be a combination of vector along west with must be of length 6 m/s and other vector is towards north with is of length 8 m/s

so correct answer must be 1st option


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Wave D has the same wavelength as wave A, but the amplitude is lower. The answer is Wave D.
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An ac power generator produces 73.37 a (rms) at 4623 v. the voltage is stepped up to 105,033 v by an ideal transformer, and the
evablogger [386]

Step up transformer is a device which is used to step up the voltage which is input with some value.

This is based upon the principle of mutual inductance and in this the voltage input and voltage output is different because of number of turns.

Here if ideal transformer is given then power input and power output of the transformer must be same as there is no power loss in ideal transformer.

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i_pV_p = i_sV_s

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73.37*4623 = 105033*i_s

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In loading a lorry, a man lifts boxes each of weight 100N through a height of 1.5m.
liq [111]

Answer:

The amount of work done in order to lift the box is 150\ Joule

Explanation:

Given the weight of each box is 100N

And the man lifts boxes at a height of 1.5m

We need to find the amount of work done.

The amount of work done is the product of applied force F that causes the displacement d.

In our problem force is 100N and displacement is  1.5m.

Now, work done

=force\times displacement\\=100\times1.5\\=150\ Joule

So, the amount of work done in order to lift the box is 150\ Joule

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What is the approximate uncertainty in the area of a circle of radius 4.5×10^4 cm? Express your answer using one significant fig
Igoryamba

Answer:

A=6.36\times 10^5\ m^2

Explanation:

It is given that,

Radius of the circle, r=4.5\times 10^4\ cm=4.5\times 10^2\ m

The area of the circle is given by :

A=\pi r^2

A=\pi (4.5\times 10^2\ m)^2

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or

A=6.36\times 10^5\ m^2

As there is no uncertainty given in the radius of the circle. So, the area of the circle is 6.36\times 10^5\ m^2. Hence, this is the required solution.

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3 years ago
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