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Fofino [41]
3 years ago
6

Why aren't descriptive investigations repeatable ?

Physics
2 answers:
Anna [14]3 years ago
7 0

Answer:

Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships

Explanation: your welcome ;))

Ann [662]3 years ago
4 0
Because the information cant be out of the investigation
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A 5592 N piano is to be pushed up a(n) 3.79 m frictionless plank that makes an angle of 30.1 ◦ with the horizontal. Calculate th
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Answer:

10628.87 J

Explanation:

We are given that

Force applied =F=5592 N

\theta=30.1^{\circ}

Displacement=D=3.79 m

We have to find the work done in sliding the piano up the plank at a slow constant rate.

Work done=F\times displacement

The perpendicular component of force=FSin\theta=5592sin(30.1)=2804.45N

Work done =Fsin\theta\times D=2804.45\times 3.79=10628.87 J

Hence, the work done in sliding the piano up the plank at a slow constant rate=10628.87 J

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3 years ago
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What is the difference between a lunar eclipse and a solar eclipse?
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A lunar eclipse occurs when Earth blocks the light going to the moon. A solar eclipse occurs when the moon blocks the light coming from the sun.

Explanation:

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Two electric charges are moved so that they are twice as far apart as they had originally been. Is the force they experience fro
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Answer:

No.

Explanation:

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F \  \alpha \  \frac{1}{D^{2}} for a distance D

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The town hall building is situated close to Boojho’s house. There is a clock on the top of the town hall building which rings th
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Rahul wants to change the motion map shown so that it shows uniform circular motion. What change should Rahul make?
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Answer:

B. He should change the lengths of the vectors that point tangent to the circle so that each is the same length.

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A uniform circular motion is a motion in a circle where the tangential speed of the object is constant.

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In this motion map, we see that the length of the vectors pointing tangent to the circle is not constant: this means that the speed is not constant. In order to have a uniform circular motion, the speed must be constant, therefore the lengths of the vectors that point tangent to the circle must be the same.

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