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Or for a more accurate measurement, attach a weight that is heavy enough to pull the object under the water, measure their combined volume, then measure the volume of the weight on its own and subtract … that from the combined volume. …

Your lab booklet is calculating the work done on the gas, whereas you are trying to calculate the work done on the piston. The pressure of the gas is not part of the calculation of the work done on th …

How can $1/V$ ever equal zero? Physically, it can't. This is just a point on a line - it does not have to correspond to an actual physical situation. It is like saying the average family has $2.3$ c …

Can you explain why he is using (diameter)^3 for volume and not (radius)^3? … In other words, Cavendish's spherical volume unit is $\frac {\pi} 6$ cubic feet, not $\frac {4 \pi} 3$ cubic feet. …

The density of water varies with temperature and with salinity. Unless you control these factors very carefully (e.g. always use distilled water at the same temperature) you are unlikely to get a prec …

The volume (and, indeed, the exact shape) of the tip are irrelevant. …

How is volume defined and measured in nuclear physics, in particular regarding the Sun’s core ? … If you are happy estimating the volume of your bath or your car's fuel tank, the same techniques can be used to estimate the volume of the Sun's core. …

Am I correct in my assessment that this $dV$ is just a "change" from a point (0 volume) to a small amount of volume $dV$ ? No. … $dV$ is simply the volume of the cube, which is assumed to be small - it does not represent a change from anything to anything. …

The mass of a black hole can be determined in the same way as we determine the mass of any other astronomical object - by observing how it deflects the paths of other objects that pass close to it. Th …

And by measuring the volume of the overflow you are, in effect, counting the water molecules that cannot find a "chair" and are out. And that tells you how many "chairs" the pineapple has taken up. …

In other words $\displaystyle \alpha(T) = \frac 1 T$ One way to see this intuitively is to realise that if the absolute change in volume per $1$ Kelvin is constant, and volume increases as temperature … rises, then the proportional change in volume per $1$ Kelvin must decrease as temperature rises. …

The error in your reasoning in (a) is that since the water exerts a buoyancy force on the ice that is equal to the ice's weight, so by Newton's Third Law the ice must exert an equal and opposite force …

... often a solid object of some material (density) sinks in water while hollow object of the same material stays afloat. If density of both the objects is same, then why does this happen ? The aver …