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lisabon 2012 [21]
3 years ago
12

Please answer this soon. Thank u.

Physics
1 answer:
vodomira [7]3 years ago
6 0

Answer:

The distance used to calculate the pressure of atmosphere is 75 cm.

Explanation:

  • Mercury barometer is used to find the pressure of the atmosphere where it is placed.
  • As shown in the figure, the barometer has an inverted tube where mercury has risen by 75 cm. This height is taken into count to measure the atmospheric pressure.
  • At the place with high pressure the mercury in the inverted tube will go very high and vice versa.
  • Hence to find the pressure we must note down the height of mercury that has risen the inverted tube.
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Answer:

The mass of the block, M =T/(3a +g)  Kg

Explanation:

Given,

The upward acceleration of the block a = 3a

The constant force acting on the block, F₀ = Ma = 3Ma

The mass of the block, M = ?

In an Atwood's machine, the upward force of the block is given by the relation

                                     Ma = T - Mg

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