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Oxana [17]
3 years ago
5

26 joules of heat is used to raise a sample of gold's temperature from 25.0°C to 35.0°C. It's mass is recorded at 20.0 grams. Wh

at is the specific heat of the sample of gold?

Mathematics
1 answer:
Snezhnost [94]3 years ago
7 0

Answer:

0.13

Step-by-step explanation:

change of heat: 35-25 =10 degrees

mass=20

energy=26

c =??

c = Q / (m * ΔT)

   =26/20*10= 26/200=0.13 J/g*k

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Applying implicit differentiation, it is found that dy/dt when y=π/4 is of:

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<h3>What is implicit differentiation?</h3>

Implicit differentiation is when we find the derivative of a function relative to a variable that is not in the definition of the function.

In this problem, the function is:

xcos(y) = 2.

The derivative is relative to t, applying the product rule, as follows:

\cos{y}\frac{dx}{dt} - x\sin{y}\frac{dy}{dt} = 0

\frac{dy}{dt} = \frac{\cos{y}\frac{dx}{dt}}{x\sin{y}}

Since dx/dt=−2, we have that:

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When y = π/4, x is given by:

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x = \frac{2}{\cos{\frac{\pi}{4}}} = \frac{2}{\frac{\sqrt{2}}{2}} = \frac{4}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = 2\sqrt{2}

Hence:

\frac{dy}{dt} = -2\frac{\cos{y}}{x\sin{y}}

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Which means that option a is correct.

More can be learned about implicit differentiation at brainly.com/question/25608353

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