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KengaRu [80]
3 years ago
15

An empty paper cup is the same temperature as the air in the room. A student fills the cup with cold water. Which of the followi

ng describes how thermal energy is transferred?
O Thermal energy is transferred from the cold water to the cup until they are at the same temperature.
O Thermal energy is transferred from the cup to the cold water until they are at the same temperature.
O Thermal energy is transferred from the cup to the cold water until the cup has no more thermal energy
O Thermal energy is not transferred between the cup and the cold water.
Physics
1 answer:
Vika [28.1K]3 years ago
7 0

Answer:

C

Explanation:

It is

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a) Lens Equation

\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}-\frac{1}{u}=\frac{1}{v}\\\Rightarrow \frac{1}{v}=\frac{1}{35}-\frac{1}{3600}\\\Rightarrow \frac{1}{v}=\frac{713}{25200} \\\Rightarrow v=\frac{25200}{713}=35.34\ mm

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b) Magnification

m=-\frac{v}{u}\\\Rightarrow m=-\frac{35.34}{3600}

m=\frac{h_v}{h_u}\\\Rightarrow -\frac{35.34}{3600}=\frac{h_v}{1800}\\\Rightarrow h_v=-\frac{35.34}{3600}\times 1800=-17.67\ mm

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