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telo118 [61]
3 years ago
15

Convection is the rising of

Physics
1 answer:
Ad libitum [116K]3 years ago
8 0

Since the outer plumage of the penguin can resist the flow of heat in the cold antarctic air they might gain a little of this heat to keep them warm by thermal convection.

<u>Explanation:</u>

  • Convection is the circular movement that happens when hot air/liquid moves with molecules that were fast, making it less dense rises while the cold air/liquid drops down.
  • Also, they follow the technique of standing together always in a group which further helps them to decrease the loss of heat between them.
  • The plumage of penguin provides 80 percent of total insulation and is highly resistant to wind penetration.

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A large crate is pushed across the floor with an effort of 45 Newtons. The box is pushed a distance of 3.5 meters. How much work
I am Lyosha [343]

Answer:

\boxed {\boxed {\sf 157.5 \ Joules }}

Explanation:

Work is equal to the product of force and distance.

W=F*d

The box is being pushed with an effort (force) of 45 Newtons and the distance is 3.5 meters.

F= 45 \ N \\d= 3.5 \ m

Substitute the values into the formula.

W= 45 \ N * 3.5 \ m

Multiply.

W= 157.5 \ N*m

  • 1 Newton meter is equal to 1 Joule
  • Our answer of 157.5 N*m equals 157.5 J

W= 157.5 \ J

<u>157.5 Joules </u> of work are done on the crate.

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3 years ago
What equation represents the law of conservation of energy in closed system
svetoff [14.1K]

The first option.

The total mechanical energy before an action (which makes up PE and KE) equals the total mechanical energy after an action.

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Answer:

Battery Voltage

Explanation:

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WINSTONCH [101]

Answer:

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Several animal species are able to hear frequencies well beyond the human hearing range. Some dolphins and bats, for example, can hear frequencies up to 100,000 Hz. Elephants can hear sounds at 14–16 Hz, while some whales can hear infrasonic sounds as low as 7 Hz (in water).

Explanation:

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