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Zinaida [17]
3 years ago
11

Please help, I really don't know

Physics
1 answer:
zubka84 [21]3 years ago
7 0

circular motion.

cent acc = r omega^2 ... omega is ang vel ... omega=2pi/T ,,,

9.8=rx(2pi/T)^2

if r is known, solve for T


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Answer:

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Explanation:

For this exercise we will use the calorimetry heat ratios, let's start with the heat lost by the evaporation of coffee, since it changes from liquid to vapor state

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Where m is the evaporated mass (m = 2.00 103-3kg) and L is 2.26 106 J / kg, where we use the latent heat of the water

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Since the only form of energy transfer is terminated, the heat transferred is equal to the evaporated heat

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The coffee dough left in the cup after evaporation is

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