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SpyIntel [72]
2 years ago
14

Maddie wanted to make a sugar-water solution to put in her hummingbird feeder. She found some sugar cubes and was about to drop

them into a glass of water, when her brother suggested crushing the cubes before mixing. Was this a good suggestion? Why or why not?
Physics
2 answers:
NNADVOKAT [17]2 years ago
3 0

Answer:

this is a good suggestion

Explanation:

when the sugar cubes are crushed and they become a powder so its surface area increases. And as surface area is directly proportional to rate of reaction so the desired solution will be formed rapidly

Nikolay [14]2 years ago
3 0

Answer:

Yes because the chunks of sugar that didn't dissolve fully would not stay in the water to provide a choking hazard for the bird. Thus being the reason to crush them.

Explanation:

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Suppose that a balloon is being filled with air at a rate of 10 cm3/s. (Assume that theballoon is a perfect sphere.) At what rat
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Therefore the surface area of the balloon is increased at 4 cm³/s.

Explanation:

The balloon is being filled with air at a rate of 10 cm³/s

It means the volume of the balloon is increased at a rate 10 cm³/s.

i.e \frac{dv}{dt} =10 cm^3/s

Consider r be the radius of the balloon.

The volume of of a sphere is

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Differentiate with respect to t

\frac{dv}{dt} =\frac{4}{3} \pi \times 3r^2\frac{dr}{dt}

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Therefore the surface area of the balloon is increased at 4 cm³/s.

5 0
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