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2 years ago

14

A food worker has prepared a large pot of rice that must be cooled

1 answer:

vazorg [7]2 years ago

8 0

<h3>Hi! I hope this answer can help you :)</h3>

<em>To safely cool rice, it is recommended that after cooking, the pot of rice should be separated into plates and immediately stored in a refrigerator.</em>

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Which is yummier chocolate or vanilla or other?

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It is a matter of opinion but I prefer chocolate

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3 years ago

Read 2 more answers

Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca

antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

$T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t}$ (1)

Where:

$T_{s}$ - Final temperature, in degrees Celsius.
$T_{o}$ - Initial temperature, in degrees Celsius.
$t$ - Time, in minutes.
$k$ - Cooling rate, in $\frac{1}{min}$ .
$T(t)$ - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when $T(t) = T_{s}$ , that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that $T_{o} = 80\,^{\circ}C$ , $t = 15\,min$ , $T_{s} = 50\,^{\circ}C$ and $T(15) = 60\,^{\circ}C$ , then the cooling rate of the substance is:

$60 = 50 + (80 - 50)\cdot e^{-15\cdot k}$

$\frac{60-50}{80-50}= e^{-15\cdot k}$

$\frac{1}{3} = e^{-15\cdot k}$

$k = -\frac{1}{15}\cdot \ln \frac{1}{3}$

$k \approx 0.0732$

The cooling rate of the substance is approximately 0.0732.

To learn more on Newton's law of cooling, we kindly invite to check this verified question: brainly.com/question/13748261

7 0

2 years ago

The number of employees in a company decreased from 40 to 28. What is the percentage decrease in the number of employees?.

Verdich [7]

Answer:

Answer: <u> </u><u>3</u><u>0</u><u>%</u><u> </u><u> </u><u>decrease</u><u> </u>

Explanation:

$= { \rm{ \frac{(40 - 28)}{40} \times 100\%}} \\ \\ = { \rm{30\%}}$

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3 years ago

Popcorn popping in a pot on the stove is an example of:.

expeople1 [14]

Answer:

Convection

Explanation:

I hope it helps Let me know.

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1 disease outbreak would be the flu

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