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Marrrta [24]
3 years ago
6

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

Physics
1 answer:
olga nikolaevna [1]3 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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Answer:

Following are the solution to this question:

Explanation:

Law:

\to \theta= 180^{\circ}- 50^{\circ}- 25^{\circ}

      = 180^{\circ}- 75^{\circ}\\\\= 105^{\circ}

\to \frac{T_{L}}{\sin (90+50)}= \frac{T_{R}}{\sin (25+90)}=\frac{1400}{\sin (105)}

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2.72 km

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2.72 km OR 2716.71 m

4 0
3 years ago
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DochEvi [55]

Answer:

b. 3 times

Explanation:

Lets take

Coefficient for ordinary glass = α₁

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Change in the temperature is also same .= ΔT

We know that change in the length  given as

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Therefore change in the length of original glass is three time of pyrex glass.

b. 3 times

6 0
3 years ago
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SIZIF [17.4K]

I'm not sure I completely understand the expression you want evaluated.

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5 0
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Explanation:

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3 years ago
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