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3 years ago

1.When molecules change state of matter from a liquid to a solid, then _______________.

2 answers:

7 0

I just took the quiz the answers are
Q1.(D) the molecules decrease
Q2. (A) Baking a birthday cake
Q3. (D) tendency to undergo oxidation

These are all correct, I hope I was able to help ya'll

Jet001 [13]3 years ago

4 0

The answwr would be d and c becasuase it just would

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If the absolute temperature of a gas is 600 K, the temperature in degrees Celsius is

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ºC = K - 273

ºC = 600 - 273

T = 327ºC

Answer C

hope this helps!

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3 years ago

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4 years ago

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Starting from rest, a small block of mass m slides frictionlessly down a circular wedge of mass M and radius R which is placed o

guapka [62]

Answer:

Part a)

$V = \sqrt{\frac{2\frac{m}{M}gR}{(\frac{M}{m} + 1)}}$

$v = \frac{M}{m}\sqrt{\frac{2\frac{m}{M}gR}{(\frac{M}{m} + 1)}}$

Part b)

Since on the block wedge system there is no external force in horizontal direction so the Center of mass will not move in horizontal direction but in vertical direction it will move

so displacement in Y direction is given as

$y_{cm} = \frac{mR}{m + M}$

Explanation:

PART A)

As we know that there is no external force on the system of two masses in horizontal direction

So here the two masses will have its momentum conserved in horizontal direction

So we have

$mv + MV = 0$

Also we know that here no friction force on the system so total energy will always remains conserved

So we have

$\frac{1}{2}mv^2 + \frac{1}{2}MV^2 = mgR$

now we have

$\frac{1}{2}m(\frac{MV}{m})^2 + \frac{1}{2}MV^2 = mgR$

$\frac{1}{2}MV^2(\frac{M}{m} + 1) = mgR$

so we have

$V = \sqrt{\frac{2\frac{m}{M}gR}{(\frac{M}{m} + 1)}}$

and another block has speed

$v = \frac{M}{m}\sqrt{\frac{2\frac{m}{M}gR}{(\frac{M}{m} + 1)}}$

Part b)

Since on the block wedge system there is no external force in horizontal direction so the Center of mass will not move in horizontal direction but in vertical direction it will move

so displacement in Y direction is given as

$y_{cm} = \frac{mR}{m + M}$

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3 years ago

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Romashka [77]

If it weren't for Newton's FIRST law.

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3 years ago

Do political maps change

lesantik [10]

I think the answer is yes because earth changes overtime.

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3 years ago