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kakasveta [241]
3 years ago
13

Which of the following correctly describes the importance of demonstrations to a scientific investigation?

Physics
2 answers:
Brums [2.3K]3 years ago
7 0

Answer:

I'd have to say A or D seems like either one of those would be right

nexus9112 [7]3 years ago
6 0
The answer is D. Scientists often use models to show how something works
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What does the area between the line and the x axis represent on a velocity vs time graph
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the area bounded by the line and the axes of a velocity-time graph is equal to the displacement of an object during that particular time period

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What would make oppositely charged objects attract each other more? increasing the positive charge of the positively charged obj
kykrilka [37]

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A.

Explanation:

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2 years ago
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The tallest building in the world, according to some architectural standards, is the Taipei 101 in Taiwan, at a height of 1671 f
Andrej [43]

Answer:

35.14°C

Explanation:

The equation for linear thermal expansion is \Delta L = \alpha L_0\Delta T, which means that a bar of length L_0 with a thermal expansion coefficient \alpha under a temperature variation \Delta T will experiment a length variation \Delta L.

We have then \Delta L = 0.481 foot, L_0 = 1671 feet and \alpha = 0.000013 per centigrade degree (this is just the linear thermal expansion of steel that you must find in a table), which means from the equation for linear thermal expansion that we have a \Delta T =\frac{\Delta L }{\alpha L_0} = 22.14°. As said before, these degrees are centigrades (Celsius or Kelvin, it does not matter since it is only a variation), and the foot units cancel on the equation, showing no further conversion was needed.

Since our temperature on a cool spring day was 13.0°C, our new temperature must be T_f=T_0+\Delta T = 35.14°C

3 0
3 years ago
28.25 mL, three signicant digits
Mazyrski [523]

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Explanation:

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3 years ago
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vodomira [7]

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(C) Average Velocity = 25 m/s due North

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3 years ago
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