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4 years ago

How many calories are needed to raise the temperature of 2g of water 3 C?

Physics

1 answer:

olga nikolaevna [1]4 years ago

8 0

Answer:

The number of calories needed is 6c.

Explanation:

The amount of energy $Q$ needed to raise the temperature $\Delta T$ of water of mass $m$ is

$Q = mC\Delta T$

where $C = 1cal/g\cdot C$ is the specific heat capacity of water.

Putting in numbers into equation (1), we get:

$Q = (2g)(1)(3^oC )\\$

$\boxed{Q = 6\:cal }$

which is the number of calories needed.

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Explanation:

From the question we are told that

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=> $|2z - d| =\frac{\lambda}{2}$

substituting values

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=> $z = \frac{5 \pm 3}{2}$

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