Which of the following will help prevent chemical hazards

Can someone please help me with this question

a_sh-v [17]

The answer is C. (0,1). I believe.

4 0

3 years ago

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

How does the name "schlemiel" contribute to the indirect characterization of professor schlemiel?

stepladder [879]

The name "Schlemiel" contributes to the indirect characterization in the story because;

Schlemiel means "an ineffectual, bumbling person," and this description fits the forgetful Professor Schlemiel very well.

Schlemiel is a Yiddish word, originally rooted in German that means, ineffectual, awkward, clumsy, and confused. All of these words correctly describe the character of Professor Schlemiel who is always forgetful.

In the story, "The Day I Got Lost", Professor Schlemiel forgot everything that was in his possession. These included his umbrella, his glasses, his briefcase, his handkerchief, and his house address!

These are signs of a bumbling and confused person.

This story was a chapter from a memoir that he was composing and he prayed that he does not forget the manuscript somewhere before it was concluded.

8 0

3 years ago

In 1-2 sentences, explain if the ellipsis is used in the paragraph to indicate a pause or an omission. Use details to support yo

DerKrebs [107]

Three equally spaced points ( . . . ) often used to represent an omission of words in a quotation are best known as ellipsis. They are also known as ellipsis dots, suspension points, or simply ellipsis.

<h3>Usage</h3>

"For example, I may be writing an article to be published in a journal and not include ellipsis. . ."

In summary, we utilise ellipsis to indicate that a list goes on beyond those items actually spelled out in the text.

Learn more about ellipsis here:

brainly.com/question/450229

8 0

2 years ago

My parents are mad at me for getting a B+. A B+! WHAT THE HECK? What do I do!!

Oduvanchick [21]

Answer:

say sorry but your not sory

4 0

3 years ago