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Fantom [35]
3 years ago
5

PLEASE HELP!!!!!!!!!!!

Physics
2 answers:
Alexxandr [17]3 years ago
5 0
I am 100% sure its A.
Eduardwww [97]3 years ago
3 0

Answer: Option (A) is the correct answer.

Explanation:

Density is defined as mass per unit volume. Basically it is the degree of compactness which means how closely particles are combined together.

When we increase the temperature of a liquid, then particles of liquid start to move vigorously. As a result, there will be more number of collisions between the particles. Hence, they will move far away from each other.

Therefore, there will be decrease in density. Now, due to change in temperature there is change in density.

Thus, we can conclude that independent variable is the temperature, and the dependent variable is the density.

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Find the unknown mass of the block 1 needed to balance the bar. Assume that the mass of the bar is negligible. Block 1 is locate
Natasha2012 [34]

Answer:

Incomplete question: The masses of the blocks m₂ = 1.5 kg and m₃ = 2 kg

Explanation:

Given data:

L₁ = length = 0.85 m

L₂ = 0.25 m

L₃ = 0.5 m

m₂ = 1.5 kg

m₃ = 2 kg

Question: Find the unknown mass of the block 1 needed to balance the bar, m₁ = ?

The torque is zero (intermediate point of the bar)

-m_{1} gL_{1} +m_{2} gL_{2} +m_{3} gL_{3} =0

Is negative because mass 1 is to the left of the coordinate system (see the diagram)

m_{1} =\frac{m_{2} gL_{2}+m_{3} gL_{3}  }{L_{1} } =\frac{(1.5*0.25)+(2*0.5)}{0.85} =1.6176kg

4 0
4 years ago
What occurs when salt is evenly mixed with water
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Hoped my answer helped! 
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Answer:

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Explanation:

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