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3 years ago

What is acid rain and how is it a problem to oceans ,rivers ,lakes , ponds , and ect.

1 answer:

8 0

Acid rain is made by atmospheric pollution from the wastes from factories the wastes of the factories contain sulfur and nitrogen oxides which then mix in the atmosphere to form acid rain. It's a problem to lakes and such by lowering the ph of the water that will most likely kill the animals/plants in the water.

You might be interested in

What is the difference between a conductor and an insulator?

Zielflug [23.3K]

A conductor is what helps heat or electricity pass through an object. Examples of conductors are, silver, iron, aluminum, etc..

An insulator does the opposite and instead, stops either from going through. Examples of an insulator is paper, wood, rubber, etc.

5 0

2 years ago

Which best describes the relationship between the terms frequency, wavelength, and hertz?

Oksanka [162]

Answer:

The correct answer is - Frequency is the number of wavelengths, which is measured in hertz.

Explanation:

Frequency is the number of waves that go through a fixed point at a particular time. Hertz is the SI unit for frequency which means that one hertz is equal to a unit number of waver passes in a unit time to a fixed point.

As the frequency of a wave increases which means the number of waves increases in the unit time, the shorter the wavelength will be.

a higher frequency wave has more energy than a lower frequency wave with the same amplitude.

5 0

3 years ago

What feature of a chemical equation is used to balance the equation and make sure it obeys the law of conservation of mass?

taurus [48]

Answer:

b) coefficient

Explanation:

Refer to this example:

CH4 +2 O2 → CO2+ 2 H2O

2 is used as a coefficient in this chemical equation.

5 0

2 years ago

Read 2 more answers

Which of the following describes a physical property? A) gunpowder explodes B) when two substances are mixed with a precipitate

ValentinkaMS [17]

The correct answer is C) A substance changes color when heated, but changes back when cooled. Hope this helps.

5 0

3 years ago

Read 2 more answers

An average person expends about 845 kilojoules of energy per hour of walking. Suppose a person eats 2 baked potatoes with butter

ExtremeBDS [4]

Answer:

$\large\boxed{2hours}$

Explanation:

You will need to use the conversion between food calories, calories and joules.

$1\text { nutritional calorie }= 1,000cal\\ \\ 1cal=4.184joule$

From a nutritional table (from the internet) you can obtain the amount of nutritional calories for each type macronutrient: carbohydrates, protein, and fat.

Macronutrient food calories

Carbohydrate 4 cal/g

Protein 4 cal/g

Fat 9 cal/g

To convert food calories to regular calories, mutiply by the conversion factor:

$1=1,000cal/\text{nutritional calorie}$

Macronutrient calories

Carbohydrate 4,000 cal/g

Protein 4,000 cal/g

Fat 9,000 cal/g

To convert regular calories to joules, multiply by the conversion factor:

$1=4.184 joule/1cal$

Macronutrient energy in joules

Carbohydrate 16,736 joule/g

Protein 16,736 joule/g

Fat 37,656 joule/g

Now you can multiply the grams of each macronutrient in one potato by its energy content:

Macronutrient energy/gram × grams = total energy

Carbohydrate 16,736 joule/g × 37 g = 619,232 joules

Protein 16,736 joule/g × 4.3 g = 71,968.8 joules

Fat 37,656 joule/g × 4 g = 150,624 joules

Total = 619,232 joules + 71,968.8 joules + 150,624 joules = 841,820.8 joules.

Since they are two potatoes, multiply by 2: × 841,820.8 joules = 1,683,641.6 joules.

Divide by 1,000 to convert to kilojoules = 1,683.64 kilojoules

Divide the total energy from the two potatoes by the energy that an average person expend per hour of walking (845 kilojoules of energy per hour):

$1,683.64kilojoules/845kilojouesl/hour=1.99hours\approx 2hours$

7 0

3 years ago