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Alinara [238K]
3 years ago
11

What did physicist James Joule's famous paddle wheel experiment demonstrate?

Physics
2 answers:
Vinvika [58]3 years ago
8 0

Answer:

that the initial gravitational potential energy of the masses transformed into kinetic energy of the paddles and then to thermal energy in the water

Explanation:

Joule was one of the foremost scientists to opine that one form of energy could be converted into other forms. In the famous "paddle wheel" experiment he used a falling weight to pull a string that turned a paddle wheel submerged in a bucket of water. It was discovered that the mechanical energy released by the falling weight was converted into heat energy by the paddle wheel. Joule then measured the amount of heat energy absorbed by the water by recording the temperature of the water before and after the paddle wheel began moving . He discovered that the increase in water temperature was directly related to the amount of kinetic energy released.

PilotLPTM [1.2K]3 years ago
7 0

<u>Answer </u>

A. that the initial gravitational potential energy of the masses transformed into kinetic energy of the paddles and then to thermal energy in the water


<u>Explanation</u>

James Joule allowed some water to fall from a height of 1 foot. the water would turn a paddle wheel at the bottom causing a temperature of water to raise.

The height form which the water fell, mass and the temperature of water was measured and used to calculate mechanical equivalent of heat.

From the choices given the best answer is A. that the initial gravitational potential energy of the masses transformed into kinetic energy of the paddles and then to thermal energy in the water.

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serg [7]

Answer:

mechanical advantage!

Explanation:

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3 years ago
What distance does light travel in water, glass, and diamond during the time that it travels 1.0 m in vacuum? The refractive ind
lidiya [134]

Answer:

refractive index for water,glass,diamond are 0.752m, 0.667m, 0.413m respectively

Explanation:

refractive index (n) = \frac{velocity of light in air/vacuum}{velocity of light in substance}

velocity =\frac{distance}{time}

The time for travel is kept constant for all mediums.

refractive index (n) = \frac{\frac{distance in vacuum}{time} }{\frac{distance in medium}{time} }\\ \\=\frac{distance in vacuum}{distance in medium}

distance in medium = \frac{distance in vacuum}{refractive index of medium}

S_{medium}  = \frac{S_{vacuum} }{n_{medium} }

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For glass, n=1.5

S_{glass}= \frac{1 }{1.5}

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For diamond, n= 2.42

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3 0
3 years ago
Which is true regarding the penetrating power of radiation? (2 points) Select one:
Monica [59]

Answer:d

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pls mark me brainliest its the right answer

6 0
2 years ago
Read 2 more answers
What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just even with the water le
astraxan [27]
The bouyancy force is:  

Since the wood-lead system is completely submerged, the bouyancy force 

 is FB = ĎwgVl + ĎwgVb, where Ďw is the density of water,Vl 

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 the piece of lead and Vb is the volume of the wooden block. The weight of the

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 ĎwgVl â’ ĎlgVl = ĎbgVb â’ ĎwgVb 

 Vl(Ďw â’ Ďl) = Vb(Ďb â’ Ďw) 

 Vl =   

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 . We get: 

 Vl =   

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 1000â’11300 

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4 0
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