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3 years ago

Which question cannot be tested with a scientific investigation?

Biology

1 answer:

ziro4ka [17]3 years ago

3 0

The question that cannot be tested is Are people who drink tea happier than people who don’t drink tea?

This is not a good scientific question because it is hard to investigate happiness of someone.

Good scientific question needs to:

• Be estable-through measurements or experiments

• Provide an answer

• Lead to hypothesis.

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olga_2 [115]

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I hope that's help:)

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Answer:

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Explanation:

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Only answer if you’re really good at science! no spams!

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2 years ago

Lila is a track and field athlete. She must complete four laps around a circular track. The track itself measures 400 meters fro

tekilochka [14]

Answer: Her speed is 4.4 m/s, and her velocity is 0 m/s.

Explanation:

Formulae : $\text{Speed}=\dfrac{\text{Distance}}{\text{Time}}$

$\text{Velocity}=\dfrac{\text{Displacement}}{\text{Time}}$

Given: Length of track start to finish= 400 meters

After completing its 4 laps, total distance covered = 400 × 4 = 1600 meters

Time taken by Lila = 6 minutes

= 6 × 60 seconds [There are 60 seconds in 1 minute.]

= 360 seconds

Then, $\text{Speed}=\dfrac{1600}{360}=\dfrac{40}{9}m/s$

$= 4.44\ m/s$

But from start to finish displacement = 0 m [displacement is the shortest distance between starting point to the finishing point]

So, $\text{Velocity}=\dfrac0{360}=0\ m/s$

Hence, Her speed is 4.4 m/s, and her velocity is 0 m/s.

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3 years ago

“Assume a molecule must cross the plasma membrane into a cell. The molecule is a very large protein. How will it be transported

svet-max [94.6K]

It will be transported into the cell through the process of endocytosis, which is a form of active transport. Active transport requires energy in the form of ATP. Hope this helps! :)

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