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Mkey [24]
3 years ago
10

What is the potential energy of a 20-kg safe sitting on a shelf 0.5 meters

Physics
1 answer:
ki77a [65]3 years ago
8 0

Explanation:

P.E=MGH

Where m is mass

Where G is Acceleration Due to Gravity

Where h is Height

So the parameters are M = 20kg

G = 9.8m/s

H = 0.5meters

P.E= 20x9.8x0.5

=98J.

So Ans. is A= 98J

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An electric pump has 2kW power . How much water will it lift every minute if the height is 10 m ?
valkas [14]

Answer:

Given that,

  • Power = 2000 W
  • time = 60 seconds
  • distance= 10m

Power = work done ÷ time

Here, since the movement is vertical, w = mgh

So,

Power = mgh÷t

2000 = (m × 9.8 ×10) ÷ 60

m = (2000 ×60) ÷98

m = 1224.5kg

3 0
2 years ago
What are the smallest parts that make up matter?
Alecsey [184]
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3 years ago
Which tem decorbes the perceived frequency of a sound wave?
JulsSmile [24]

Pitch

Explanation:

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The quality of sound that makes it discernible to the ear is the pitch.

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learn more:

Pitch brainly.com/question/9772227

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#learnwithBrainly

5 0
2 years ago
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SI is considered a consistent system because it what
NemiM [27]

Answer:

because it is a worldwide system....

Explanation:

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The perceived loudness of a sound is measured in
diamong [38]
<h2>Answer: decibels </h2>

The decibel dB is the relation between two values: the pressure produced by a sound wave and a pressure taken as a reference. Resulting in a dimensionless value.

It should be noted that itself<u> is not a unit of measure</u>, since in reality the unit is bel B (which <u>is not part of the International System of Units</u>) in honor of Alexander Graham Bell.

However, given the amplitude of the measured elements in practice, its submultiple, the decibel, is used. That is, this quotient is a logarithmic expression, where 1dB=0.1B

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2 years ago
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