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3 years ago

7

What happens when an experiment with new information or new technology produces results that support an existing theory?

2 answers:

Dimas [21]3 years ago

6 0

A theory does <em>not </em>become a law! So, C is already out.

In science, we always want to be updating and revising our information. We don't just say 'Oh, this supports my theory. Ah ha! It's proven! No more research is needed'.

The best option here will most likely be B. =)

fenix001 [56]3 years ago

3 0

Theory is a scientifically acceptable general principle. When an experiment with new information or new technology produces results that support an existing theory the theory is revised or updated. Correct answer:B A scientific theory is not the end result of the scientific method. With more gathered information theories can be proven or rejected, improved. Over time the accuracy of the prediction becomes greater.

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Scientific notation: Convert 7.1 x 10-3 to decimal notation.

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Answer: hey

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3 years ago

A stone is thrown vertically upwards with an initial velocity of 20m/sec. Find the maximum height ot reaches and the time taken

MAXImum [283]

Answer:

The height reached is 20m, The time taken to reach 20m is 2 seconds

Explanation:

Observing the equations of motion we can see that the following equation will be most helpful for this question.

$v^{2} = u^{2} + 2as$

We are given initial velocity, u

We know that the stone will stop at its maximum height, so final velocity, v

Acceleration, a

And we are looking for the displacement (height reached), s

Substitute the values we are given into the equation

$0^{2} = 20^{2} + 2(10)s$

Rearrange for s

$0^{2} -20^{2} =20s$

$-400=20s$

$\frac{-400}{20} =s$

s = -20 (The negative is just showing direction, it can be ignored for now)

The height reached is 20m

Use a different equation to find the time taken

$s = vt - \frac{1}{2} at^{2}$

Substitute in the values we have

$-20=(0)t - \frac{1}{2} (10)t^{2}$

Rearrange for t

$-20 =0 -5 t^{2}$

$\frac{-20}{-5} =t^{2}$

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The time taken to reach 20m is 2 seconds

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3 years ago

If 100 kg person weighed 400 N on the planet Zorg,

Brut [27]

Answer:

<u>4 m/s²</u>

Explanation:

<u>Formula</u>

Weight = Mass x Gravity due to acceleration

<u>Solving</u> :

400 N = 100 kg x g
g = 400/100
g = <u>4 m/s²</u>

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2 years ago

Read 2 more answers

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