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3 years ago

Sarah is a member of her school's cheerleading squad.

SAT

2 answers:

sweet-ann [11.9K]3 years ago

4 0

Answer:

She's a member of her school's cheerleading squad.

Dafna1 [17]3 years ago

4 0

Group dynamics is the correct answer

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Which of the following is a technique to improve internal validity

3241004551 [841]

The technique to improve internal validity is D) Addition of a control group.

<h3>What is internal validity?</h3>

Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.

it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.

Learn more about internal validity on:

brainly.com/question/968894

#SPJ1

COMPLETE QUESTOIN:

Which of the following is a technique to improve internal validity ____________?

A) Experimenter expectancy

B) Participant bias

C) Use of a confederate

D) Addition of a control group

4 0

2 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

Do you agree with mrs hutchinson that the lottery is unfair why

Mashcka [7]

Answer:

yeah I do think it's an unfair system how many people actually win? the chances of you winning are very slim thousands and even millions of people buy lottery tickets every years and just end up loosing. you end up losing more money then winning.

HOPED THIS HELP YOU

6 0

2 years ago

When a government is not balanced or predictable, it is known as what type of government?

Lubov Fominskaja [6]

Answer:

Unstable Government

Explanation:

pls j0!n me

mnv-dyzw-eov

there will be nothing unsafe or inappropriate

4 0

3 years ago

which line from the passage best provides evidence to support the claim that sugar was more of "a killer" in louisiana than in t

Naddik [55]

Answer:

The correct answer is option D "People needed to work faster than the weather. . . ."

Explanation:

The text refers to sugar as "a killer" in Louisiana as they did not have the hot weather as in the Caribbean to harvest.

Then, slaves had to increase their production and beat the weather because otherwise the crop would be completely ruined.

For this reason, the work of slaves in Louisiana was much more exhaustive than in the Caribbean.

8 0

3 years ago