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What is more dense 1 kg of iron or 1 kg of feathers?
they are the same... they are both 1kg
Which has more mass 1kg or 1 mg?
There are 1 million mg in 1 kg, so the kg apparently seems to have more mass.
Would a kilogram of a feather have more mass than a kilogram of iron?
Since kilograms are the unit we use to measure mass, the answer is no: both have 1kg. of mass. :D
Is 1 kilogram of gold heavier then 1 kilogram of feathers?
No, 1 kilogram of gold and 1 kilogram of feathers weigh the same amount, as they both have a mass of 1 kilogram. However, gold is denser than feathers, so the volume of 1 kilogram of gold would be smaller than the volume of 1 kilogram of feathers. This is due to the differing densities of the materials, with gold being much denser than feathers.
Which is heavier 1kg of stone or 1kg of feathers?
It's a trick question, but with a not-so-trick answer:The expected "correct" answer, is that since both "weigh" 1kg, they both have the same weight, and so neither one is heavier.The CORRECT answer actually depends on a few more details, which will be explained in steps as follows:1) The kg is a unit of mass, whilst weight, in the correct meaning of the word, is a measurement of forcemeasured in Newtons.2) Force = mass x acceleration-> Weight = mass x acceleration-due-to-gravity (g = 9.81 m/s2)So up until now, we could argue that the stones and the feathers each have a weight of approx. 9.81 Newtons. However, so far we've only calculated the downward force on the two objects due to gravity.Assuming that we're measuring the weight of these two objects somewhere on Earth, we must also consider the effects of the Earth's atmosphere, specifically the upward force this causes. Since air is a fluid, we must consider the effects of upthrust on these two objects:3) Upthrust = weight-of-displaced-fluidNow this is where things start to get interesting! Since we can safely assume that stone is more dense than feathers, then for the two objects to have the same mass of 1kg, the volume of the feathers must be greater than the volume the stone. Therefore, they will displace more of the fluid (air):4) Stone-upthrust < Feathers-upthrustSo, getting back to weight:5) Weight = downforce-due-to-gravity - upthrust-from-fluidSo, since the downforce due to gravity is equal in both instances, BUT the feathers produce more upthrust, the weight of the stone is, in fact, greater than the weight of the feathers.Therefore, if they are both measured at the same location on Earth, 1kg of stone will be heavier than 1kg of feathers.(Just don't tell your school Physics teacher this, unless you want him to think you're a smart-ass :-)
