3 years ago

Can someone please help me answer this!!

1 answer:

4 0

I may be wrong, but i believe it is C, as there is no mention of sunlight being a control variable. the amount of sunlight greatly determines plant growth since they obviously use it for photosynthesis

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Two particles have a mass of 8kg and 12kg, respectively. if they are 800mm apart, determine the force of gravity acting between

natima [27]

The magnitude of the force of gravity acting between the particles is:
$F=G\frac{m_1.m_2}{d^2}$
The weight of each particle is:
$P=mg$
Now let's plug in the numbers knowing that $G=6.67\times10^{-11}$ , $g=9.81$ , $d=0.8$ and m1 and m2 are already given in kilograms. We get then:
$P_1=m_1.g=78.48$ N
$P_2=m_2.g=117.72$ N
$F=G\frac{m_1.m_2}{d^2}=1.00\times10^{-8}$ N

This results shows us why we don't often see objects being attracted to each other, their mass is too small compared to the earth gravitational pull.

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3 years ago

Taste and smell are called chemical senses because:

Bingel [31]

Answer:

The answer is a," their receptors are sensitive to chemical molecules."

3 0

4 years ago

A hollow glass prism doesnot cause the dispersion of light why?<br><br>Please HELP! Its urgent..

eimsori [14]

Answer:

When white light passes through the prism ,different colours suffers deviation through different angles and light appears to be dispersed. But in a hollow prism dispersion does not take place as all the colours travel with same speed in the air inside hollow prism. Thus no angular dispersion is there.

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3 years ago

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Francium decays with a half-life of 22 minutes. If we start out with 639 mg of francium,how much would remain after 2.7 hours?

Vinil7 [7]

Answer:

3.87 or 3.9 mg

Explanation:

2.7h * 60mins = 162mins

number of 1/2 lives = 162/22= 7.364

amount remaining = 639(1/2)^7.364 = 3.8796

answer = 3.87 or 3.9