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weeeeeb [17]
2 years ago
6

4. What is the domain? Explain. ​

Mathematics
1 answer:
olasank [31]2 years ago
5 0

Answer:

The domain is (0,5) In the given pair...

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A concentric-tube heat exchanger cools hot water owing at 1 kg/s from 80C to 30C. It uses air owing at 5 kg/s to perform this co
nordsb [41]

Answer:

The log-mean-temperature-difference is 24.03⁰C

Step-by-step explanation:

First we need to know if the heat exchanger is in parallel flow or counter-flow. However, counter flow arrangement is best used to recover heat.

L.M.T.D for counter flow is given as;

L.M.T.D =\frac{(T_h_f_1 -T_c_f_2)-(T_h_f_2 -T_c_f_1)}{2.3log[\frac{T_h_f_1 -T_c_f_2}{T_h_f_2 -T_c_f_1}]}

where;

Thf₁ is the initial temperature of the hot fluid = 80°C

Tcf₂ is the final temperature of the cold fluid = 51.5°C

Thf₁ - Tcf₂ = 80 - 51.5 = 28.5⁰C

Thf₂ is the final temperature of the hot fluid = 30°C

Tcf₁ is the initial temperature of the cold fluid = 10°C

Thf₂ - Tcf₁ = 30 - 10 = 20⁰C

L.M.T.D = \frac{28.5 -20}{2.3Log[\frac{28.5}{20}]} \\\\L.M.T.D = \frac{8.5}{0.3538} =24.03^oC

Therefore, the log-mean-temperature-difference is 24.03⁰C

3 0
3 years ago
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Is the answer yes or no tell me please ?
diamong [38]

Answer:

Yes.

Step-by-step explanation:

4 0
3 years ago
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Part B: Describe how you can make the line of best fit. Write the approximate slope and y-intercept of the line of best fit. Sho
GaryK [48]
We are using a line regression tool to solve the parameters asked in the problem. We can use online tools or that of Excel. According to the tool, the best fit values are 
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Best fit lines make sure that the standard deviation at each point is minimum from the best fit line.</span></span></span>
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3 years ago
Y&gt;1 and y&gt;x on a graph
zlopas [31]

So,

y>1\wedge y>x

1. Graph each inequality separately.

2. Choose a test point to determine which side of the line needs to be shaded.

3. The solution to the system will be the area where the shadings from each inequality overlap one another (purple area)

As for the system of inequalities we say it's unbounded.

3 0
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Melissa buys 3 and 3/4 gallon S of iced tea. Debora buys 7 quarts more than Melissa How much tea do they buy although? Express y
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All Togther they bought 37 quarts of iced tea
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