2 years ago

Find the pressure exerted by a 3000 N crate that has an area of 2m squared

Physics

1 answer:

ipn [44]2 years ago

8 0

Pressure = Force/ Area = 3000/2 = 1500 pascal.

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2. A girl whose mass is 55kg stands on a spring weighing machine inside a lift. When the lift starts to ascend, its acceleration

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An object 5.Ocm in the length is placed at a distance of 20cm in front of convex mirror

andrew-mc [135]

Answer:

Position = $\frac{60}{7}\ cm$ behind the mirror

Nature = Virtual and Erect

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Explanation:

Sign convention-Distance measured to the left of pole is negative and to the right of pole is positive.

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Since the image distance is positive, it is formed behind the mirror or a virtual image is formed.

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Height of the image = $5\times\frac{3}{7}=\frac{15}{7}\ cm$

Since the height of the image is positive and less than the size of object,it is erect and diminished.

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3 years ago

in a thermal power plant, heat from the flue gases is recovered in (A) chimney (B) de-super heater (C) economizer (D) condenser

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Explanation:

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