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Xelga [282]
3 years ago
13

A sailor pulls a boat along a dock using a rope. How much work does the sailor do if he exerts a force of 255 N on the rope and

pulls the boat 11.4 m?
Chemistry
1 answer:
navik [9.2K]3 years ago
8 0

Answer:

The work done is 2,907 J

Explanation:

Work is one of the forms of energy transmission between bodies. To perform a job, you must exert a force on a body and it moves. In other words, when a force is applied to a body and it moves, work is done.

The work is equal to the product of the force by the distance and by the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:

W = F * d * cos α

In the International System of Units the Force is expressed in newtons and the distance in meters, so the work will have units of newtons. Meter = joules (J).

In this case:

  • F= 255 N
  • d= 11.4 m
  • α=0

Replacing:

W= 255 N* 11.4 m* cos 0

Solving:

W= 255 N* 11.4 m* 1

W= 2,907 J

<u><em>The work done is 2,907 J</em></u>

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Explanation:

The equation of the reaction is given as;

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9.01g of Be produces 79.92g of BeCl2

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What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g

25g of BeCl2 = 0.3128 mol of BeCl2

From the equation;

1 mol of H2 is produced alongside 1 mol of BeCl2

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<h3>What is a mole?</h3>

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The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s constant, in honour of the Italian physicist Amedeo Avogadro (1776–1856). Avogadro proposed that equal volumes of gases under the same conditions contain the same number of molecules, a hypothesis that proved useful in determining atomic and molecular weights and which led to the concept of the mole.

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brainly.com/question/1427235

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