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Flura [38]
3 years ago
11

A ball is thrown horizontally from the roof of a building 56m tall and lands 45m from the base. What was the ball's initial velo

city?
Physics
2 answers:
Ede4ka [16]3 years ago
6 0
The balls initial velocity is 0 because it starts at rest
Anettt [7]3 years ago
5 0
Is that the full question

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Contrast radiation with conduction<br> ( keep it short and simple , make one sentence . )
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Answer:

In radiation, heat transfer occurs through electromagnetic waves without involving particles. In conduction, heat transfer takes place between objects by direct contact.

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You should vary your ____________ based on the size and noise level of the venue you are speaking in.
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I think, the best word to fill the blank is "voice". <span>You should vary your voice based on the size and noise level of the venue you are speaking in. Because when you are speaking you use your voice to be heard. Also, it is the only thing you can vary depending on the size and the noise when speaking in a certain location.</span>
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A. In the building there are 133 steps from the ground floor to the sixth floor.
faust18 [17]

(a) The work done by the person is 18.83465 kJ.

(b) The average power performed by the person during the walk is 51.4 W.

(c) The amount of food calories burnt is 4.5 Cal.

<h3>Work done by the person</h3>

The work done by the person is calculated as follows;

W = Fd

W = mgh

W = (89.2 x 9.8) x (0.162 x 133)

W = 18,834.65 J

W = 18.83465 kJ

<h3>Average power of the person</h3>

P = Fv

where;

  • v is velocity

v = (d)/t

v = (133 x 0.162)/(6 x 60   +  6)

v = (133 x 0.162)/(366)

v = 0.0588 m/s

P = (89.2 x 9.8) x 0.0588

P = 51.4 W

<h3>Amount of food calories burnt</h3>

4.1868 kJ = 1 Cal

18.83465 kJ = ?

= 4.5 Cal

Learn more about work done here: brainly.com/question/8119756

#SPJ1

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2 years ago
Which reasons explain why a theory would be changed or replaced?
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A firefighter directs a stream of water from a fire hose at an angle of 40.0° above the horizontal. If the velocity of the strea
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Answer: The time of motion of the stream of water is calculated as follows;

X = Vₓt

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