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antiseptic1488 [7]
2 years ago
14

——- need an answer asap!!

Physics
2 answers:
Schach [20]2 years ago
7 0

Answer:

c

Explanation:

Lerok [7]2 years ago
3 0
The correct answer is is C
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A pail in a water well is hoisted by means of a frictionless winch, which consists of a spool and a hand crank. When Jill turns
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Answer:

166 W

Explanation:

Power is the rate at which work is done.

\text{Power} = \dfrac{\text{Work done}}{\text{time}}

The work done by Jill is the product of the weight of the pail and the height it moves.

The weight is the product of the mass and acceleration of gravity, <em>g</em>. Taking <em>g</em> as 9.81 m/s², the weight is

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Work done = (67.689 N)(27.0 m) = 1827.603 J

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Singly charged gas ions are accelerated from rest through a voltage of 10.3 V. At what temperature (in K) will the average kinet
Natasha_Volkova [10]

Answer:

Temperature of the gas molecules is 7.96 x 10⁴ K

Explanation:

Given :

Ions accelerated through voltage, V = 10.3 volts

The work done to change the position of singly charged gas ions is given by the relation :

W = q x V

Here q is charge of the ions and its value is 1.6 x 10⁻¹⁹ C.

Average kinetic energy of gas molecules is given by the relation:

K.E. = \frac{3}{2}kT

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According to the problem, the average kinetic energy of gas is equal to the work done to move the singly charged ions, i.e. ,

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T= \frac{2qV}{3k}

Substitute the suitable values in the above equation.

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