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Tju [1.3M]
2 years ago
14

Is mechanical energy conserved as a playground swing moves? Why or why not?​

Physics
1 answer:
Lynna [10]2 years ago
6 0

Answer:NO

Explanation:

No, because as it swings it is mechanical energy that changes from almost completely potential energy to almost completely kinetic energy and thermal and sound.

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The element Ne, neon, has ____ (number) complete shells having its ____ electrons in second _____.
KatRina [158]

Answer:

2, 8 and shell

Explanation:

Neon as atomic number 10. Since for each shell, electrons equal 2n².

When n = 1, 2n² = 2(1)² = 2

When n = 2, 2n² = 2(2)² = 8

So it fills both the first and second shell with 2 and 8 electrons respectively to achieve its stable atomic state. The rest of the 8 electrons go into the second shell because the first shell has achieved its stable dual configuration of two electrons. The next shell requires a maximum of 8 electrons to achieve stability so, the remaining electrons fill it up to achieve the stable octet configuration.

8 0
3 years ago
Closed path that electric current follows
allochka39001 [22]
The closed path of an electric current is called the CIRCUIT.
6 0
3 years ago
A baseball player uses a pitching machine to help him improve his batting average. he places the 54.6 kg machine on a frozen pon
Mila [183]
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3 0
3 years ago
What does the Doppler effect at baseball game measure
forsale [732]
It should measure speed as far as I can remember. But, just in case narrow it down to 2 answers and go from there.
3 0
3 years ago
100 POINTS.<br> PLEASE EXPLAIN YOUR ANSWER.
Drupady [299]

Explanation:

Draw free body diagrams for each mass.

There are 3 forces on the disk: weight force mg pulling down, normal force N pushing up, and tension force T pulling right.

There are 2 forces on the cylinder: tension force T pulling up and weight force 3mg pulling down.

Sum of forces on the disk in the centripetal direction:

∑F = ma

T = m v²/r

Sum of forces on the cylinder in the vertical direction:

∑F = ma

T − 3mg = 0

T = 3mg

Substituting:

3mg = m v²/r

3gr = v²

v = √(3gr)

Plug in values:

v = √(3 × 10 m/s² × 0.800 m)

v = √24 m/s

v ≈ 4.90 m/s

6 0
3 years ago
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