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AnnZ [28]
3 years ago
8

You drop the pendulum bob and it swings from point A to point C, and then back again. Eventually it slows down and stops, settli

ng at point B. A similar pendulum can be found in a pendulum clock. However, the clock pendulum does not stop; it continues to swing back and forth, with a tick-tick. Why is there a difference between the lab pendulum and the clock pendulum?
A) All of the potential energy is not converted to kinetic energy.
B) An enclosed pendulum is not acted on by air resistance or gravity.
C) An external energy source, like a battery, is needed to maintain motion.
Eliminate
D) Air resistance is not a factor since the pendulum is housed inside the clock.
Chemistry
1 answer:
maria [59]3 years ago
6 0
B An enclosed pendulum is not acted on by air resistence or gravity. Plus, pendulum's in clocks are electronic (I think) so that's why it keeps moving back in forth. (at least i think so)

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why do solids keep their shape and volume why do liquids keep only volume and why do gases not keep either shape or volume
kodGreya [7K]
Solids always have definite shape and definite volume because their particles are packed together. Liquids have a definite volume but not definite shape, because their particles still kinda tight but able to move around, and gases don’t have a definite shape nor volume, because their particles are crazy and go everywhere
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A rigid vessels contains
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Hope this helps you.

3 0
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3 years ago
If the earth is about 13000 light years away from the outermost edge of the milky way galaxy, what is the total diameter of the
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3 0
3 years ago
Consider the following data for five hypothetical elements: Q, W, X, Y, and Z. Rank the elements from most reactive to least rea
Natalka [10]

Answer:

Y, Q, W, Z and X

Y > Q > W > Z > X

Explanation:

To know the most reactive element, the element will be able to displace other metal in it compound. We also have to observe if the reaction occur. If the reaction didn't occur, that means the element is not reactive than the metal found in the other reactant. Invariably their will be no displacement.

Q + w+ Reaction occurs

Q element displace the metal w in it compound . This means Q is more reactive.

x +z+ No reaction

No reaction here. This means x is less reactive than z as it couldn't displace z in it compound.

w + z+ Reaction occurs

w is more reactive than z as it displaces z in it compound.

Q+ + Y Reaction occurs

Y is more reactive than Q as it displaces Q in it compounds.

Therefore, the most reactive to the least reactive is arrange as follows.

Y, Q, W, Z and X

8 0
3 years ago
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