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3 years ago

8

You have learned in biology class that a substance called chlorophyll makes leaves green. You guess that perhaps leaves change c

olor because they do not produce chlorophyll when temperatures get colder. What have you done?

2 answers:

Shkiper50 [21]3 years ago

7 0

You have formed a hypothesis.

atroni [7]3 years ago

4 0

you have formed what you call a hypothesis, is kinda like a theory.

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myrzilka [38]

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If n=2 you divide by 4
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3 years ago

Two gliders collide on a frictionless air track that is aligned along the x axis. Glider A has an initial velocity of +4.0 m/s a

DedPeter [7]

Answer:

As collision is elastic,thus we can use conservation of momentum equation

mA=0.2 kg

(vB)1=0 m/s.......................as it is on rest before collision

(vA)1=4 m/s

(vA)2=-1 m/s

(vB)2=2 m/s

using equation

(mA*vA+mB*vB)1= (mA*vA+mB*vB)2

Where 1 and 2 represents before and after collision

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0.8=-0.2+(2mB)

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3 years ago

A vector must always have both size and ..

DochEvi [55]

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For example,
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2 years ago

A 26-kg sled is on a snow-covered slope. The coeﬃcients of friction between the sled’s runners and the snow are µs = 0.096 and µ

sweet-ann [11.9K]

Answer:

Explanation:

Given

mass of sled =26 kg

coefficient of static friction $\mu _s=0.096$

coefficient of kinetic friction $\mu _k=0.072$

In order to move sled from rest we need to provide a force greater than static friction which is given by

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3 years ago

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kompoz [17]

' A ' and ' D ' are both correct statements.

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