Should I add more?

Question

I'm writing a hypthesis for my science project backed up by research. I need to add more..but what? My proj.: Can you make two raw eggs float in a glass of salt and plain warm water? My hypothesis so far: My hypothesis is that the raw egg will float in a glass of salt water because salt water is thicker and denser than plain water. This is because the denser a liquid, the more buoyancy it provides for an object. You will float higher when swimming in salt water than in fresh water because salt water is denser. In physics, buoyancy is an upward force on an object immersed in a fluid (a liquid or a gas), enabling it to float or at least to appear lighter. Buoyancy is important for many vehicles such as boats, ships, balloons, and airships. The buoyancy of an object depends, therefore, only upon two factors: the object's volume, and the density of the surrounding fluid.

Thanks for your help! :)

Answer 1

Good project. I'd agree with the other Answerer about retooling the last sentence. I suggest adding a sentence or two about *why* the salt water is more dense (salinity, salt content, something something) as compared to the plain water. I would stick the salinity sentences in right before you go into physics ("In physics, bouyancy...") to show that you're thinking of the chemistry separately. Really a great idea for a project. Good luck.

Answer 2

You are welcome:):). This is what I like about yahoo q/a you find something new every day. YOu are100% right eggs will float in warm salt water. (I just checked:)).

Buoyancy also depends on shape. A wide long shape will float more of the object if it is equaled out in weight than an egg shaped object. however if of course the weight was liquid as in the egg the narrowest end of the egg would have more be the one out of the water as th eweight or volume fills the largest end makeing it the heavest. which sinks first due to gravity.

Answer 3

Your last line is technically vague. Bouyancy depends on the density of the object relative to the density of the fluid. The term volume is ambiguous, because in the case of a ship, the physical volume of the metal is different than the physical volume of the ship. What makes a ship bouyant is that its effective density is lower than that of water.

Answer 4

You're on the right track. density is the key. You can dissolve more salt til it floats. Thicker doesn't have much to do with it.

Answer 5

Sounds fine to me