The weight of a body in water is one third of its weight in air. What is the density of the material of the body? Thanks

distance divided by speed of light= 150,000,000/300,000= 500 seconds 8.3333 8.3 minutes now divide this by 60 x 24 x 365.25. so you will get answer= .000015823 light years.

Let's break the answer down into three parts: $color (brown) ("First,"$ we're going to convert grams to pounds using this conversion factor: $color(white)(aaaaaaaaaaaaaaaaa$ 1 pound = 453.592 grams $color (purple)...

Use "Dimensional Analysis" to determine what "conversion factors" you will need before you do the math. $g/"mL" xx "??"/"??" = "lbs"/"gal"$ We need a mass conversion unit ($g to "lbs"$)...

The idea here is that you need to find the mass of the life jacket by using the total mass of water displaced by the person and his life jacket....

Since the problem provides you with the volume of the jacket, you will have to focus on find its mass by using the total mass of water displaced by the...

$"Molar mass (Cu)"$ $=$ $63.55$ $g*mol^-1$. $"Molar mass (Pt)"$ $=$ $195.08$ $g*mol^-1$. This threefold difference in molar mass, of course translates to . Given that the difference in densities is...

The question is not clear but I think this is likely what you are looking for. If $2/3$ of the block of wood is submerged then $color(white)("XXX")$the mass of water...

of carbon tetrachloride at ambient conditions is approximately 1.5 g/ml, so for a given volume carbon tetrachloride has a higher mass than water. So when combined the carbon tetrachloride...

Well we can work out the density..... $rho="Mass"/"Volume"=(8.184*g)/(10.5*mL-1.2*mL)=0.88*g*mL^-1$. This could literally be anything.........

And I use $"US gallon"$ because even here in the UK we have moved away (thankfully) from the gallon as a unit of volume......(NB $"1 Imperial Gallon"-=4546*mL$). Maybe now that...