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gulaghasi [49]
3 years ago
9

3kg of water at 80degree celcius is added to 8 kg of water at 25 degree celcius. find the temperature of final mixture provided

there is no loss of heat in the surrounding. the specific heat capacity is 4200j/kg​
Physics
1 answer:
Nitella [24]3 years ago
3 0

Answer:

hope fully it help s

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A girl playing tug-of-war with her dog pulls the dog a distance of 8.0m by exerting a force at an angle of 18° with the horizont
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Answer:

25 N

Explanation:

Work is a product of force and perpendicular distance moved.

W=Fd where F is force exerted and d is perpendicular distance.

However, for this case, the distance is inclined hence resolving it to perpendicular so that it be along x-axis we have distance as dcos\theta

Therefore, W=Fdcos\theta

Making F the subject of the formula then

F=\frac {W}{dcos\theta} where \theta is the angle of inclination. Substituting 190 J for W then 18 degrees for \theta and 8 m for d then

F=\frac {190}{8cos18^{\circ}}\approx 25N

3 0
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Salsk061 [2.6K]
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6. A student notices that when a weight is hung on a spring, the spring stretches. She decides conduct an experiment to determin
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Answer:

D

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Nothing else matters.

The dependent variable therefore is the amount the string stretches. So the last choice is the answer.

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A 10-kg cart moving at 5 m/s collides with a 5-kg cart at rest and causes it to move 10 m/s. Which principle explains the result
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B) law of conservation of momentum

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After Impact:

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You can see the momentum before and after impact is same as 50 kg m/s  

Of course we assumed that the first cart stopped after the impact, and there are no energy losses.
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I think the answer is "<span>The ball that went out of the park shows more work because the distance was greater."</span>
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