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vredina [299]
3 years ago
6

Unlike an observational study, an experiment can prove:

Physics
1 answer:
Zinaida [17]3 years ago
3 0

A. Cause and effect.

Explanation:

An experiment can prove cause and effect in a study unlike observational studies.

  • Observational studies is a non-experimental system of investigation.
  • It helps to identify the causes(independent variable) and the effect(dependent variables).
  • In observational studies, the variables cannot be controlled and so it is difficult to prove the cause and effect.
  • An experiment can prove cause and effect because the parameters are tested and can be controlled.

Learn more:

Experiment brainly.com/question/5096428

#learnwithBrainly

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They host three or more distinct ecosystems at different elevations.

Explanation:

I checked it, and its right.

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When water changes into vapor this is called?
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4 years ago
What are the principals of electric arc welding
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7 0
3 years ago
An iron block of density rhoFe and of volume l 3 is immersed in a fluid of density rhofluid. The block hangs from a scale which
PolarNik [594]

Answer:

R=m*g-∀fl*g*l3

Explanation:

<em>An iron block of density rhoFe and of volume l 3 is immersed in a fluid of density rhofluid. The block hangs from a scale which reads W as the weight. The top of the block is a height h below the surface of the fluid. The correct equation for the reading of the scale is</em>

From Archimedes' principle we know that a body when immersed in a fluid, fully or partially, experiences an the upward buoyant force equal to the weight of the fluid displaced. As the body is fully submerged in water, volume of water displaced  

density of iron =mass/ volume

rho=m/l3

mass=rhol3

weight fluid=rhofluid*g*Volume

weight of fluid=rhofluid*g*l3

F=∀fl*g*l3

Downward force is weight of iron

w=m*g

Reading on the spring scale

R=w-F

R=m*g-∀fl*g*l3

m=mass of iron

g=acceleration due to ravity

rhfld=density of fluid

l3=volume of fluid displaced

6 0
3 years ago
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