At the circle justice meeting, who's voice made

After reviewing the results of a math test, the teacher tells the class that those students who completed their review worksheet

Vsevolod [243]

The option that best describes how the teacher likely came to this conclusion is that:

The teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.

<h3>What is observational study?</h3>

An observational study is known to be a kind of study where a researcher do observes the subjects without having any form of interference with them.

Here, the researcher is said to have no control over any of the treatments that is used on the subjects. All the have to do is observe and record their findings.

See options below

A. The teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.

B. The teacher conducted a sample survey by asking students if they completed their review worksheets and if they think they did well on the test.

C. The teacher performed a controlled experiment in which one group of students decided not to complete their review worksheets and the other group decided to complete their review worksheets.

D. The teacher performed a random experiment in which the test scores of one group of students would be higher and the test scores of the other group would be lower.

Learn more about worksheets from

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3 0

2 years ago

A linear machine is connected as shown in Fig. 1. The input source voltage Vin=10V, the internal resistance Rin=0.05Ω. The appli

galina1969 [7]

It is important to note that the direct of flow of the electricity current in the Linear Machine is anti-clockwise direction. The resultant effect of this is such that is stand at variance with the change in flux as force is going the right direction. See attached Image (Illustration I).

<h3>What is the magnitude of the current?</h3>

Recall that Force (f) = il xB

Given that Force (F) = 10N; and

Magnetic Field Density B = 0.5T

Hence,

10 = i x 0.2 x 0.5

[Note that Width is converted to Meters from millimeters that is 200 mmm = 0.2m]

10 = 0.1i

i = 10/0.1

i = 100A

<h3>What is the Induced Voltage Across the metal bar?</h3>

Note that Vg = Vde + IR

Vg = 10 + 100 x 0.05

Vg = 10 + 5

Vg = 15v

<h3>What is the final speed of the metal bar?</h3>

The final speed of the bar is given as V

Recall that Induced Voltage is VB x L

That is:

15 = V x 0.5 x 0.2;

15 = 0.1 V

make V the subject of the formula:

V = 15/0.1

V = 150m/s

<h3>What is the status of the Machine? a motor or generator?</h3>

Given that the current being supplied is in DC hence the machine is a generator. [Vdc x i]

<h3>What is the electric power of the source?</h3>

The electric power of the source is:

Vdc x i

= 10 x 100

= 1,000 watts

Learn more about electric current:

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8 0

2 years ago

In the past, behaviorists were not likely to view cognition as a part of learning because cognition __________. A. Does not affe

Ann [662]

Answer:

C. Is unobservable

Explanation:

6 0

3 years ago

The professor samples her class by selecting 5 females and 7 males. this type of sampling is called?

Serhud [2]

Answer:

Random selection

Explanation:

4 0

3 years ago

What has the largest negative impact on biodiversity?(1 point).

svet-max [94.6K]

Building over habitats

I hope this helps you :)

7 0

3 years ago