Which factor is generally responsible for high melting points?

1 answer:

5 0

High melting points have to do with excessive amounts of heat provided on frozen surfaces. Even pollution creates high melting points because the ice isnt use to the chemicals provided in pollution.

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Examining the figure, how many orders of magnitude larger is a person than a bacterial cell?

TEA [102]

This question is repeated. I will copy the same answer provided by myself.

Well you did not show the figure, but I can show you how to do it.

Suppose the person is 6 feet tall and the bacteria cell is 1 micrometer in length.

So, put both magnitudes in the same units. I will use meter.

Person: 6 feet * 0.3048 m / foot = 1.8288 m, which in orders of magnitud is about 2 m

Bacteria cell: 1 micrometer * 1 m / 1,000,000 micrometer = 1 * 10 ^ -6 m.

Now divide: 2m / 10^ -6 m = 2,000,000

So a person is about 2 million times larger than a bacteria cell.

If the numbers in your figure are different you can use the same method to get a new result according to your figure.

4 0

3 years ago

Lisa was keeping a record of the sales she had made for the contest. The first and second

Roman55 [17]

Answer:

Lisa sold 75 boxes of cookies all together

Explanation:

The 1st week she sold 18 boxes of cookies

The 2nd week she sold 18 of cookies

The 3rd week she sold 12 boxes of cookies

The 4th week she sold 12 boxes of cookies

The 5th week she sold 15 boxes of cookies

So, number of cookies sold altogether is 18+18+12+12+15= 75

7 0

3 years ago

Energy that is stored is called potential energy. Take a round ball that is at rest at the top of the hill. The ball has a lot o

kodGreya [7K]

The question says that when the ball is placed at the top of the hill it has a lot of potential energy. So I think the higher a ball is placed the more potential energy it will have

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3 years ago

Butter goes rancid if we keep it outside the fridge.

rjkz [21]

Salted butter does not need to be stored in the fridge since the risk of bacterial growth is so low. ... However, it will stay fresh longer if it is kept in the refrigerator. Refrigeration slows down the process of oxidation, which will eventually cause butter to go rancid.

I hope this helps!

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3 years ago

A solution is saturated in both nitrogen gas and potassium bromide at 750C. When the solution is cooled to room temperature, wha

Amiraneli [1.4K]

Some Potassium bromide precipitates out of solution.

Option B.

<h3><u>Explanation:</u></h3>

Solubility is defined as the tendency of a substance to get mixed into a solvent at a particular temperature and pressure. The amount of solubility is defined as the amount of substance in grams which will make a saturated solution of 100ml at a temperature and pressure.

Potassium bromide is a salt and nitrogen is a gas. The solubility of the salts generally increase with temperature in water, and decreases with decrease in temperature. So in case of potassium bromide, the solubility of the salt will decrease, leaving some precipitate in the room temperature.

While in case of gases, the solubility of them do decrease with increase in temperature. So at room temperature, solubility of nitrogen will be more than that in 750°C. So no gas will bubble off.

8 0

3 years ago