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NeTakaya
2 years ago
5

50 J of work was performed in 20 seconds. How much power was used to do this task?

Physics
2 answers:
Cloud [144]2 years ago
8 0

The Correct answer to this question for Penn Foster Students is: 2.5 W

yuradex [85]2 years ago
7 0
Power=work/time
power=50/20
50/20=2.5
Therefore A. 2.5 W
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In the produce section of a supermarket, five pears are placed on a spring scale. The placement of the pears stretches the sprin
tankabanditka [31]

Answer:

The displacement of the spring due to weight is 0.043 m

Explanation:

Given :

Mass m = 2 Kg

Spring constant k = 450 \frac{N}{m}

According to the hooke's law,

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Where F = force, x = displacement

Here,

F = mg         ( g = 9.8 \frac{m}{s^{2} } )

F = 2 \times 9.8 = 19.6 N

Now for finding displacement,

  x = \frac{F}{k}

Here minus sign only represent the direction so we take magnitude of it.

  x = \frac{19.6}{450}

  x = 0.043 m

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8 0
2 years ago
If you have an effusive personality, then it __________ of you. motor oil will __________ across the gravel if it spills out of
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The first answer in the blank is pours out of you, the second answer in the space provided is diffuse. It is because a person who has an effusive personality will likely pour out his or her emotions while the motor oil will likely diffuse if this has been spilled out of the can.
6 0
2 years ago
A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly abov
Rudik [331]

Answer:

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Explanation:

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So,

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Hope that it helps :)

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because water is loosely packed but when it is cold it becomes closely packed in order to form ice and thus the force attraction between them also increase.

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