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pochemuha
3 years ago
15

What does a control group show in an experimental investigation?

Physics
2 answers:
Pani-rosa [81]3 years ago
8 0

The control group, receiving no intervention, is used as a baseline to compare groups and assess the effect of that intervention.

jonny [76]3 years ago
7 0

The control group in an experimental investigation shows how nature would act without manipulation by the researchers.

Answer: Option B

<u>Explanation: </u>

The control group, a separated group from the rest of all other scientific experiments. The work done by this group does not affect the results of the actual experiment. The significant work of this group is to analyse the independent variables and their influence on the experiment. The control group is also classified as positive group and negative group.

The work of positive group is to check whether the independent variables were affecting the other parameters in a positive way to get the desired results. While the negative group composes the constraints to be followed by the investigators to get the desired results. Thus the control group shows how nature would act without manipulation by the researchers.

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Susie walks 3 blocks north to the local CVS store, then 4 blocks east to her grandmother’s house. She then walks 2 blocks west a
Slav-nsk [51]

Answer:

Suzie is 3 blocks north of where she started

Explanation:

Displacement is the minimum distance between the initial and final point of motion.

Here, Suzie first walks 3 blocks north. From there she walks 4 blocks east. Then 2 blocks to the east then 2 blocks north and then 2 blocks east. She covered 4 blocks east toward west. This is the same distance she covered traveling east. But she is 2 blocks north. From there she traveled a block south to the pizzeria and another block to her friends house. She covered the two block she had traveled north.

Hence, Suzie is 3 blocks north of where she started.

7 0
3 years ago
Which two statements describe a situation that would result in a change to landforms on Earth’s surface.
Lilit [14]

Answer:

A. A volcano erupts on a small island.

C. Flooding loosens dirt and rocks along a hillside.

Explanation:

Tectonic activities and mass wasting will greatly lead to a change in land forms on earth's surface.

When a volcano erupts on a small island, a change in landform often results. Also, flooding can lead to changes in land form.

  • Volcanic eruptions generally adds new materials to the earth surface.
  • Magma that reaches the surface called lava deposits rock materials unto the surface.
  • During an extensive period of flooding, materials are carried from one place to another and this greatly sculpts the surface of the earth.
7 0
4 years ago
Why is velocity squared in kinetic energy and mass multiplied by 1/2?
maxonik [38]
Remember the definition of work done.
Work done is force(F) times displacement(x)
∴ W = F.Δx 
According to Newton's 2nd law of motion,

F = ma
∴ W = ma.Δx ---- (i)
Using the kinematical equation v²-u² = 2ax,
aΔx = (v²-u²)/2 

Plug this value in (i),

∴W = m[\frac{v^{2}-u^{2}  }{2}]
∴W = \frac{mv^{2} }{2} -  \frac{mu^{2} }{2}

Which is nothing but change in kinetic energy.
That is how kinetic energy is derived 
5 0
3 years ago
Which would be the most reliable source for information about the toxicity of an industrial chemical?
kvasek [131]
A scientific journal article that is peer reviewed. This is because it is more likely not have factual information and sources to that information.
3 0
3 years ago
Read 2 more answers
2 Jim keeps a can on the ramp. The can
IceJOKER [234]

Answer:

The description of the statement is summarized throughout the explanation section below.

Explanation:

  • The layer of the ramp must've been harsh, which exacerbated the toy movement to occur gradually. This same friction force was indeed starting to function on the remote control car as well as trying to stop that one to react quickly.
  • Jim does have to simplify the exterior including its ramp by scrubbing or greasing to overcome impact as well as make driving travel quicker.

6 0
3 years ago
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