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Papessa [141]
3 years ago
5

Assuming there is not friction or air resistance, which of the following is true about total mechanical energy of a swinging pen

dulum?
It is the greatest at the top

It remains constant throughout the entire swing

It is zero the entire time

It is the greatest at the bottom
Chemistry
1 answer:
andrew11 [14]3 years ago
6 0

Answer:

The answer is: It remains constant throughout the entire swing.

Explanation:

The "total mechanical energy" refers to the sum of the potential energy and the kinetic energy. When it comes to swinging pendulum, the total mechanical energy refers to the sum of the "gravitational potential energy" and the "kinetic energy."

Remember that the pendulum is "not in free fall" because it is constrained by a string. The tension in the string is being balance by a gravitational force that is acting on it. So, when the pendulum swings (back and forth), the gravitational potential energy and the kinetic energy undergoes a constant exchange of energy. So,<u> this allows the mechanical energy to be conserved.</u>

If friction is present<u>,</u><u> the mechanical energy will then be turned into other forms of energy.</u>

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kicyunya [14]

Answer:

His kinetic energy is converted into potential energy.

Explanation:

6 0
2 years ago
How many moles of nitrogen gas are there in 16.8 L of this gas at STP?
sweet-ann [11.9K]
According to Avogadro's Law, same volume of any gas at standard temperature and pressure will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

                  n = moles = ?
                  V = Volume = 16.8 L

Solution:
               
As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

                           = ( 1 mole × 16.8 L) ÷ 22.4 L
                    
                           = 0.75 moles

Result:
           
16.8 L of Nitrogen gas will contain 0.75 moles at standard temperature and pressure.
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3 years ago
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zysi [14]

Answer:

Hey there!

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1 mole has 6.02*10^23 molecules in it.

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3 years ago
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