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disa [49]
3 years ago
5

What causes heat energy when you rub two objects against each other?

Chemistry
2 answers:
harkovskaia [24]3 years ago
3 0

Answer:

Friction is a force that opposes motion. ... When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

avanturin [10]3 years ago
3 0

Answer: Friction

Explanation: a force between two moving objects rubbing together that slow the objects and produces heat.

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For the set of numbers below, find the mean and the median.
beks73 [17]
Mean: 17
Median:3
Average is mean, so it’s 17.
7 0
3 years ago
Convert 3.2 moles of ch4 to number of molecules
REY [17]

Answer: 1.93 x 10^24 molecules

Explanation:

CH4 is the chemical formula for methane, the first member of the alkane family.

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 molecule

So, 1 mole of CH4 = 6.02 x 10^23 molecules

3.2 moles of CH4 = Z

To get the value of Z, cross multiply:

(Z x 1 mole) = (6.02 x 10^23 molecule x 3.2 moles)

Z•mole = 19.26 x 10^23 molecules•mole

Divide both sides by 1 mole

Z•mole / 1 mole = 19.26 x 10^23 molecules•mole/ 1mole

Z = 19.26 x 10^23 molecules

Place Z in standard form

Z = 1.93 x 10^24 molecules

Thus, 3.2 moles of ch4 has 1.93 x 10^24 molecules

3 0
4 years ago
________ is an indication of how near the air is to saturation rather than the actual quantity of water vapor in the air.
hjlf

Answer: Relative humidity

Explanation:

Relative humidity (RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest. The same amount of water vapor has higher relative humidity in cool air than in warm air. A related parameter to that regard is that of dew point.

5 0
3 years ago
Guy’s pleaseeee help
dusya [7]

Answer:

A. All isotopes have no charge

5 0
3 years ago
Which type of mixture can be separated using magnetism?
Tasya [4]
<span>You can separate mixtures that have magnetic components. The reason is because you can use magnetism to separate out the magnetic components.</span>
3 0
4 years ago
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