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 lead 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-fluid
Now this is where things start to get interesting! Since we can safely assume that lead 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 lead. Therefore, they will displace more of the fluid (air):
4) Lead-upthrust < Feathers-upthrust
So, getting back to weight:
5) Weight = downforce-due-to-gravity - upthrust-from-fluid
So, since the downforce due to gravity is equal in both instances, BUT the feathers produce more upthrust, the weight of the lead is, in fact, greater than the weight of the feathers.
Therefore, if they are both measured at the same location on Earth, 1kg of lead 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 :-)
No, both weigh a kilogram
By definition, they have exactly the same mass.
lead is much more dense than feathers, so 1 kg of lead occupies much less space (volume) than 1 kg of feathers
tungsten is more more heavier han the lead as it has great mass in less volume
yes because lead is heavier than steal.
Of course not.A small jar of lead will be much heavier than a slightly larger jar of feathers.
They are the same weight
Yes, uranium is more dense (heavier) than lead.
No, both weigh a kilogram
Lead is unquestionably heavier than an equal volume of feathers.
The feathers "take up more room" than the lead. It would be hard to compress the feathers to make them as dense as lead. The feathers have more volume.
They all would weigh the same amount, 1 Kilogram.
Because lighter and heavier refer to an objects weight - which has nothing to do with density ! For example - a kilo of feathers is heavier than half a kilo of lead - but lead is more dense !
it is obviously the same weight because it say KILO for both!
It is not. They have exactly the same mass and so must have the same weight.
Lead is heavier than iron.
By definition, they have exactly the same mass.