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Tanzania [10]
3 years ago
11

What fraction of the earth did the former continental glaciers cover?

Chemistry
2 answers:
bija089 [108]3 years ago
5 0
<span>i think one third part of the earth </span>
8090 [49]3 years ago
4 0

Answer:

About 30-35%

Explanation:

Glaciers are defined as the large moving blocks of ice that are formed by the gathering and solidification of snow on the high elevated mountains. The poles and near-polar region are suitable locations for the formation of glaciers as the high latitude areas experience a very cold type of climate.

During the last glaciation or ice age, the maximum portion of the earth that was occupied with glaciers was about 30-35% of the total landmass.  

At present, glaciers cover only 10% of the earth's total landmass that includes the glaciers, large ice caps, and the extensive sheets of ice that are present in Antarctica as well as Greenland.

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Which is the metric standard for measuring energy? Which unit is used for specific heat capacity? If you wanted to compare the a
DENIUS [597]

1. Which is the metric standard for measuring energy?

The <u>metric standard for measuring of energy </u>defined by the International System of Units is the joule (J), which is defined as the work done by a force of a newton in a displacement of one meter in the direction of force. So,

1 J = 1 N m = 1 kg·m²/s²

Calorie is also frequently used in scientific and technological applications. Calorie is a <u>unit of thermal energy that is equivalent to the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Celsius</u>.

1 cal = 4,184 J

2. Which unit is used for specific heat capacity?

The specific heat capacity (c) is a physical quantity that is defined as the <u>amount of heat (</u><u>q</u><u>) that must be supplied to the mass unit of a thermodynamic substance or system to raise its temperature by one unit.</u> So,

c = q / m ΔT

where m is the mass of the substance and ΔT is the temperature increase.

In this way, as heat is a form of energy, the International System of Units expresses the specific heat in <u>joules per kilogram and per kelvin</u> (J kg⁻¹ K⁻¹). Another common unit, not belonging to the SI, is the <u>calorie per gram and per degree centigrade</u> (cal g⁻¹ ° C⁻¹).

3. If you wanted to compare the abilities of olive oil and peanut oil to gain or lose thermal energy, which unit would you use?

You should use units of specific heat capacity (J kg⁻¹ K⁻¹) since, as mentioned above, this is a physical quantity that measures the amount of heat that must be supplied to an specific mass of a substance or system to raise its temperature.

Heat is a thermal energy, so <u>by using heat capacity units you can compare the ability of</u><u> </u><u>olive oil and peanut oil to gain or lose thermal energy by varying its temperature.</u>

3 0
3 years ago
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