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alina1380 [7]
3 years ago
8

Which of the following is an example of observational scientific investigation?

Physics
1 answer:
zhuklara [117]3 years ago
7 0

Answer:

The Awnser is C

Explanation:

Placing test tubes in an ice bath for 15 minutes

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A 7.0-μC point charge and a point charge are initially extremely far apart. How much work does it take to bring the point charge
vazorg [7]

Answer:1.008 ×10^-14/rJ

Where r is the distance from.which the charge was moved through.

Explanation:

From coloumbs law

Work done =KQq/r

Where K=9×10^9

Q=7×10^-6C

q=e=1.6×10^-19C

Micro is 10^-6

W=9×10^9×7×10^-6×1.6×10^-19/r=100.8×10^-16/r=1.008×10^-14/rJ

r represent the distance through which the force was used to moved the charge through.

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2 years ago
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Which of the following would be a good question that could be scientifically investigated?
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Do cherry popsicles freeze slower than orange popsicles
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Momentum  is a product mass and velocity. If a certain object posses a kinetic energy, then it should have a momentum since it is moving which has a velocity. However, if the object is at rest and only has potential energy, then it would not have momentum. So, for the first question the answer would be yes, an object can have energy without having any momentum. For the second question, every object whether it is moving or at rest, possess some energy, potential for an object at rest and kinetic for an object that is moving. Thus, the answer would be no, an object having momentum would always have energy.
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3 years ago
How does the current in a circuit change if the resistance is doubled? The current is halved. The current is doubled. The curren
Inessa05 [86]

Answer:

The current is halved

Explanation:

The relationship between the current and the resistance is given by Ohm's Law, as follows:

V = IR\\I = \frac{V}{R}

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Hence the correct option is:

<u>The current is halved</u>

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In the diagram, q1, q2, and q3 are in a straight line.
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did anyone figure it out

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please help

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