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Maksim231197 [3]
3 years ago
12

Three bags containing different number of wooden cubes are dropped from the same height. Which of the following statements is tr

ue?
A) Bag A has more kinetic energy than Bag C as it falls
B) Bag C has the most kinetic energy before it was release
C) Bag B has less kinetic energy than Bag A as it falls.
D) Bag A has the least potential energy when it is dropped
Chemistry
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

I don't have the number of cubes in each bag, but whichever bag had the most cubes would have the most kinetic energy as it falls

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The answer would be A. You cannot decrease mass because of increasing temp so it can't be C and adding neutrons or protons would be changing the atom and therefore the element, and that is not possible through just an increase of temperature, so it can't be B or D. Hope this was helpful! ;)

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3 years ago
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If the density of water is 1.00 g/mL and the density of mercury is 13.6 g/mL, how high a column of water in meters can be suppor
dexar [7]

Answer:

The answer to this is

The column of water in meters that can be supported by standard atmospheric pressure is 10.336 meters

Explanation:

To solve this we first list out the variables thus

Density of the water = 1.00 g/mL =1000 kg/m³

density of mercury  = 13.6 g/mL = 13600 kg/m³

Standard atmospheric pressure = 760 mmHg or 101.325 kilopascals

Therefore from the equation for denstity we have

Density = mass/volume

Pressure = Force/Area  and for  a column of water, pressure = Density × gravity×height

Therefore where standard atmospheric pressure = 760 mmHg we have for Standard tmospheric pressure= 13600 kg/m³ × 9.81 m/s² × 0.76 m = 101396.16 Pa

This value of pressure should be supported by the column of water as follows

Pressure = 101396.16 Pa =  kg/m³×9.81 m/s² ×h

∴  h = \frac{101396.16}{(1000)(9.81)} = 10.336 meters

The column of water in meters that can be supported by standard atmospheric pressure is 10.336 meters

4 0
4 years ago
Aluminum costs about 85 cents per pound (453.592 g). How much is one atom of aluminum?
kakasveta [241]

One aluminum atom will cost 0.84 × 10⁻²³ cents.

Explanation:

Aluminium costs 85 cents per 453.592 grams.

number of moles = mass / atomic weight

number of moles of aluminium = 453.592 / 27 = 16.8 moles

To calculate the number of aluminum atoms we use the Avogadro's number:

if         1 mole of aluminum contains 6.022 × 10²³ aluminum atoms

then    16.8 moles of aluminum contains X aluminum atoms

X = (16.8 × 6.022 × 10²³) / 1 = 101.17 × 10²³ aluminum atoms

Now, taking in account the aluminium price, we devise the following reasoning:

if         101.17 × 10²³ aluminum atoms costs 85 cents

then   1 aluminum atom costs Y cents

Y = (1 × 85) / (101.17 × 10²³) = 0.84 × 10⁻²³ cents

Learn more about:

Avogadro's number

brainly.com/question/1445383

brainly.com/question/13272803

#learnwithBrainly

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<span>An Inference Is An Idea Or Conclusion Thats Drawn From Evidence And Reasoning. An Inference Is Also An Educated Guess.</span>
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Answer:

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A) Bromine

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