Specific Gravity and Density of Mixtures - Fluids Physics Problems

This physics video tutorial provides a basic introduction into specific gravity and density. It explains how to calculate the specific gravity of a substance and how to calculate the density of a liquid mixture such as water and alcohol. It contains practice problems on calculating the mass of air a rectangular room and how to calculate the weight of a balloon filled with air. It contains many examples involving calculations with volume, mass, and density.

Static Equilibrium:

Elasticity and Hooke's Law:

Tensile Stress:

Elastic Modulus:

Bulk Modulus:

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Volume Unit Conversion:

Will It Sink or Float?

Intro to Pressure & Fluids:

Atmospheric Pressure Problems:

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The Gallon Crusher:

Absolute Pressure Vs Gauge Pressure:

Water Pressure Vs Gauge Pressure:

Full-Length Videos and Worksheets:

Physics PDF Worksheets:

[Proosh]

I will never forget how much you helped me during my pre med studies... Basically you are one of the reasons I was able to get to medical college...
Really appreciate your work...

[victorchikwe]

A lump of gold is suspected to contain some quantity of aluminum. if the gold sample has a mass of 0.5kg and specific gravity of 5.2. Find what mass of gold is present if the specific gravity of gold and aluminum are respectively 19.3 and 2.6

[babalolaabdullateefolamide]

Thank you very much for all done because with your videos, I have been to solve so many questions on physics.
Please help solve this question that I have been give me problems for a very long time.
This is the question ;
A lump of gold is suspected to contain some aluminium. If d gold sample has a mass of 500g and is found to av a relative density of 5.2, find what mass of gold is present if d relative densities of gold n aluminum are respectively 19.3 and 2.6

[HamzaAhmed-tcsx]

Instead, of saying the balloons, skin you could just say the mass of the surface of the balloon is 0.35kg, but other than that the video was great, and you deserve more attention.

[danielwonthis]

Can you solve more questions on Density of mixtures?

[caseypeterson]

As a 10th-grade high school dropout, I am now age 38 I don't know much about this stuff at all. I have recently developed a new affection for maths and sciences. Thanks are due to you YouTubers or covid and distance learning. This is the first video I'm watching of yours.
Anyway, I am in question about the balloon problem. How I picture it. If it were a ball it would have a more rigid structure. It could, absent of any foreign influence, remain a ball. Thus allowing the air inside to be neutral to the air outside. Isn't this the viable situation needed, to be able to apply your formula? The balloon, on the other hand, is completely limp and non-rigid when neutral until more and more air gets forced into it and is pressurized enough to form the ball shape which we can use your formula. But now the balloon has a positive air pressure. Wouldn't that create a need to know the psi of the balloon to get an accurate mass measurement?

[jexlodd]

But in practical life ethyl alcohol and water so possitive deviation hence volume slightly increase

[saraanderson]

You had me until 9.8 is g....where did that number come from memory? need to let us know this.

[MohamdRagabAmmar]

How many grams of water must be
added to 200 mL of NaOH solution in
order to have a solution with a specific
gravity of 1.157, 13.55%? (Specific
gravity of NaOH = 1.32, 28.83%)

can you show me how to solve this problem, please?

[blackhawktv]

I think the volume is 4186, 66667 not 4188, 8

[aal]

I don't understand why we can't simply add the density of water and alcohol together to get the total density

[jexlodd]

You not change ballon skin weight in gram

[phasorsystems]

Hello could you try this software? Stumble Upon androidcircuitsolver on google

[B_Rael]

This doesn't make sense to me you're calculating gravity by using Substances such as air which have water molecules and Air and water have a natural

You cannot measure gravi because it doesn't existThe only way you can even think of measuring gravity is going outerspace and getting something big or small to measure the type of force which is placed on a object

Since we cannot do this and not even tried we cannot replicate gravity and since we cannot replicate gravity we can not say for sure if it exist in the 1st place

We know for sure even in space things can weigh-in have some mass to it but at that point we would need a force pushing down to measure

It is one said when you are in the water are you wet when you're in it or wet when you come out

Same goes for gravi when you are in it is it I'll force or when you out of it is it forced on you

Everything gets pushed down equally but bigger things are heavier and smaller things are lighter the pending on the mass or the flatness

A helium balloon rises and are Feather Falls where does gravi fit into this the balloon is wider in ways more then the feather but the air inside of it defeats gravity ????

Things done add up

[guobiaoxie]

I think when you mix 30L water and 50L alcohol together does not become 80L of water/alcohol mixture.