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Liono4ka [1.6K]
3 years ago
7

Using your model, create the following scenarios. i. Night time, the Americas. <-- what would this look like?

Physics
1 answer:
vodomira [7]3 years ago
3 0

Answer:

I night time, the Sun will be on the opposite side of the planet that is in the night time, and the Mon will be in different positions (depending on the hour)  in the same side that the place that is in the night time.

Then in the model, if you left the Earth unchanged, you need to place the Sun bellow the Earth (So America is in the opposite side) And the moon above the Earth (So in America a person can see the moon)

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A disk rotates freely on a vertical axis with an angular velocity of 50 rpm . An identical disk rotates above it in the same dir
True [87]

Answer:

Final angular velocity is 35rpm

Explanation:

Angular velocity is given by the equation:

I1w1i + I2w2i = I1w1f -I2w2f

But the two disks are identical, so Ii =I2

wf can be calculated using

wf = w1i - w2i/2

Given: w1i =50rpm w2i= 30rpm

wf= (50 + 20) / 2

wf= 70/2 = 35rpm

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3 years ago
If a cup of coffee has temperature 95∘C95∘C in a room where the temperature is 20∘C,20∘C, then, according to Newton's Law of Coo
lina2011 [118]

Answer:

T = 76.39°C

Explanation:

given,

coffee cup temperature = 95°C

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expression

T( t ) = 20 + 75 e^{\dfrac{-t}{50}}

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T( 0 ) = 20 + 75 e^{\dfrac{-0}{50}}

T(0) = 95°C

temperature after half hour of cooling

T( t ) = 20 + 75 e^{\dfrac{-t}{50}}

t = 30 minutes

T( 30 ) = 20 + 75 e^{\dfrac{-30}{50}}

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T(30) = 61.16° C

average of first half hour will be equal to

T = \dfrac{1}{30-0}\int_0^30(20 + 75 e^{\dfrac{-t}{50}})\ dt

T = \dfrac{1}{30}[(20t - \dfrac{75 e^{\dfrac{-t}{50}}}{\dfrac{1}{50}})]_0^30

T = \dfrac{1}{30}[(20t - 3750e^{\dfrac{-t}{50}}]_0^30

T = \dfrac{1}{30}[(20\times 30 - 3750 e^{\dfrac{-30}{50}} + 3750]

T = \dfrac{1}{30}[600 - 2058.04 + 3750]

T = 76.39°C

4 0
3 years ago
2
Arte-miy333 [17]

Answer:

the answer is C ----- it is the rate of change of velocity per unit time

Explanation:

acceleration

=  \frac{velocity(v)}{time(t)}

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4 years ago
Which until is commonly used to measure density
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