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Mnenie [13.5K]
3 years ago
9

Which BEST describes the difference between speed and velocity?

Physics
2 answers:
Murljashka [212]3 years ago
8 0
D. velocity includes rate of change and direction

Andrew [12]3 years ago
8 0
<span>D) Velocity includes rate of change and direction.</span>
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The latent heat of fusion of alcohol is 25 kcal/kg and its melting point is -114 o C. It has a specific heat of 0.60 in its liqu
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Answer:

=170kcal

Explanation:

We first calculate the amount of energy required to melt the alcohol using the formula: MLf, where Lf is the latent heat of fussion

We then calculate amount of heat required to raise the temperature of liquid alcohol to -14° C using MC∅.  We then add the two.

Thus ΔH=MLf+MC∅

ΔH=2kg×25kcal/kg+ 2kg×(0.6kcal/kg.K×(-14-⁻114)

=50kcal+120kcal

=170kcal

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