Why is a cell theory a theory and not a law

1 answer:

7 0

Laws are very rare in science and they focus on simple, clear, and undisputed facts. A scientific theory is an explanation that is based upon the evidence that is available. With the theory of evolution, and many other scientific theories, the Cell Theory has extremely strong evidence to support it.
Hope this helps!

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Physics help me this is idek

blagie [28]

Assuming B is a stoping point that means there is acceleration because acceleration is slowing down to a stop, turning around, or speeding up. Now we also know that its speed is decreasing due to the fact that the dots are getting closser to each other. Its only velocity is it tells a direction and speed so that rules out B and C. All you have left is A and D so, you need to figure out which one has acceleration as slowing to a stop and the speed decreasing. (They kind of walk hand in hand.)

I hope that helped you.

5 0

3 years ago

An asteroid has acquired a net negative charge of 126C from being bombarded by the solar wind over the years, and is currently i

Lemur [1.5K]

The net charge of the asteroid is
$Q=-126 C$
with a negative sign since it is a net negative charge.

The charge of one electron is
$e=-1.6 \cdot 10^{-19} C$

In order to find what is the excess of electrons on the asteroid, we must simply divide the net charge in excess on the asteroid by the charge of a single electron, and we find:
$N= \frac{Q}{e}= \frac{-126 C}{-1.6 \cdot 10^{-19} C} =7.87 \cdot 10^{20}$

4 0

2 years ago

A 2.0kg rocket is traveling straight up. What force muse be applied to the rocket for it to move at a constant velocity?

Yuliya22 [10]

A equal force it always has to be equal

5 0

3 years ago

What is the change in momentum of a 40 kg runner that travels from 5 m/s to 11 m/s

pochemuha

p=mv where p is momentum in kgms-1, m is mass/kg and v is velocity/ms-1

Therefore to find the change in momentum we can just substitute the numbers in and find the difference.

At 5ms-1 the runner has a momentum of 5*40=200kgm/s
At 11ms-1 the runner has a momentum of 11*40=440kgm/s

Finding the difference, the change of momentum is 240kgm/s

8 0

3 years ago

A soccer ball takes 20 s to roll 10 m. What is the average speed of the soccer ball?

Over [174]

Answer:

0,5 m/s²

Explanation:

v = d /t

v = 10 / 20

v = 0,5 m/s²

<h3>The velocity of the ball is 0,5 m/s²</h3>

3 0

3 years ago

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