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Ganezh [65]
2 years ago
11

A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW.

Mathematics
1 answer:
jasenka [17]2 years ago
3 0

Answer:

Net power = 20kW

B.) $128

Step-by-step explanation:

Given that :

Coefficient of performance = 2.5

Rate = 20kW

The net power required to operate the heat pump :

Energy delivery rate / Coefficient of performance

= 20kW / 2.5

= 8kW

B.) Given that electricity cost equals $0.08 per kW

If pump operates for 200 hours

Total energy used in kWhr :

8kW * 200= 1600kW

Cost per kW = $0.08

1600 * 0.08 = $128

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Marine biologists have determined that when a shark detectsthe presence of blood in the water, it will swim in the directionin w
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Solution :

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The equation is equivalent to

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$\triangledown C= \frac{\partial C}{\partial x}i+\frac{\partial C}{\partial y}j$

$\Rightarrow \triangledown C =-\frac{2}{10^4}e^{-(x^2+2y^2)/10^4}(xi+2yj),$ and

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$r(t)=x(t)i+y(t)j$  is a parametrization of the most $\text{rapid increase curve}$ , then

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So then we have that $\frac{dr}{dt}=\lambda \triangledown C$

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$\frac{dy}{y}=2\frac{dx}{x}$

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but we know that $y(x_0)=y_0$

$\Rightarrow kx_0^2=y_0$

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$y=\frac{y_0}{x_0^2}x^2$

$y=y_0\left(\frac{x}{x_0}\right)^2$

7 0
3 years ago
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