Member • Aug 25, 2012
Member • Aug 25, 2012
Member • Aug 25, 2012
To some extent, yes.zaveriA submarine remains submerged in water at a particular depth by controlling the water content in its ballast tanks. does that principle apply here ?
Member • Aug 25, 2012
bioramaniConsider a body of water that has a uniform temperature gradient higher at the surface and progressively colder downward. There will be a corresponding density gradient. Any object with a density in between that at the top and at the bottom will float at a point where the density matches.
Alternatively, in a static body of water and in the absence of thermal currents, a body of matching density can remain stationary anywhere, though even the slightest disturbance will cause it to move.
Member • Aug 26, 2012
Size of the propeller will depend on the inertia of the system. The object may float at a given point. However, though it has zero weight its inertia depends on its mass plus drag in the medium. The larger the size, the greater this effect unless streamlined.sureshkumargceIn the static body of water (absence of thermal currents)the body has to float at different regions.Is it possible by fixing any small propeller.? What type of calculations have to be made.?
Member • Aug 27, 2012
Sir i'm new to engineering so could you please explain in simpler words, as i don't know what exactly is temperature gradient or thermal currents either. If you could explain your answer with an example??? thanks 😀bioramaniConsider a body of water that has a uniform temperature gradient higher at the surface and progressively colder downward. There will be a corresponding density gradient. Any object with a density in between that at the top and at the bottom will float at a point where the density matches.
Alternatively, in a static body of water and in the absence of thermal currents, a body of matching density can remain stationary anywhere, though even the slightest disturbance will cause it to move.
Member • Aug 28, 2012
Member • Sep 13, 2012
Member • Sep 13, 2012
Member • Sep 14, 2012
Member • Sep 14, 2012
oh ok... haven't experimented it, but read it somewhere.bioramaniNot quite. If an unboiled egg floats it is spoilt.
Member • Sep 14, 2012
The shell is impervious to water. Except for a very small bubble at the top eggs are usually already full. Other than snakes' eggs, which are leathery, birds' eggs are rigid. It is unlikely that boiling leads to an increase in density.mreccentricBTW, is the mass of boiled egg more than unboiled one?
Member • Sep 29, 2012
TY... Then what do you think makes it float or sink? i know that, i can verify this as i have that book... but what makes the boiled egg semi-solidify when boiled?, as you say its impermeable.bioramaniThe shell is impervious to water. Except for a very small bubble at the top eggs are usually already full. Other than snakes' eggs, which are leathery, birds' eggs are rigid. It is unlikely that boiling leads to an increase in density.
Member • Sep 29, 2012
That is a simple matter. The yellow yolk becomes a solid powder on cooking. The white is essentially albumin that gels into a semi solid on cooking.mreccentricbut what makes the boiled egg semi-solidify when boiled?, as you say its impermeable.
Member • Sep 29, 2012
does that also mean that there is some chemical change?bioramaniThat is a simple matter. The yellow yolk becomes a solid powder on cooking. The white is essentially albumin that gels into a semi solid on cooking.
Member • Sep 29, 2012
You are right. Boiling is a chemical change. A boiled egg does not become a raw one, no more than a boiled chicken lay eggs.mreccentricdoes that also mean that there is some chemical change?
Member • Sep 29, 2012
Member • Sep 29, 2012
bioramaniConsider a body of water that has a uniform temperature gradient higher at the surface and progressively colder downward. There will be a corresponding density gradient. Any object with a density in between that at the top and at the bottom will float at a point where the density matches.
Alternatively, in a static body of water and in the absence of thermal currents, a body of matching density can remain stationary anywhere, though even the slightest disturbance will cause it to move.
Member • Sep 29, 2012
bioramaniConsider a body of water that has a uniform temperature gradient higher at the surface and progressively colder downward. There will be a corresponding density gradient. Any object with a density in between that at the top and at the bottom will float at a point where the density matches.
Alternatively, in a static body of water and in the absence of thermal currents, a body of matching density can remain stationary anywhere, though even the slightest disturbance will cause it to move.
Member • Oct 1, 2012
