a big hole
You can put a hole in the barrel to make it weigh 8 kilograms.
You could put a 1 kg weight inside the barrel to make it weigh 8 kg.
An empty barrel that weighs 9 kilograms can be reduced to 8 kilograms by putting a hole in it. The hole has to be large enough to remove exactly 1 kilogram from the barrel.
The correct wording is "Empty vessels make the most noise". When you knock on a empty barrel, it's loud, a full barrel is quiet. SO, he who has nothing to say - says too much.
Helium has a lower density than air, therefore replacing the air in the barrel with helium decreases the mass of the barrel system thus the weight is decreased.
Wait a couple of hundred years and put anti-gravity in it. Put air in it and take it on a ride on the vomit comet aircraft to have the barrel experence weightlessness. Maybe you could just take the top off and let it fill with the sorrounding air and it will weigh less while the top is off. BEST ANSWER: A HOLE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11
To make the barrel of water weigh 12 pounds, you would need to remove 8 pounds of water from the barrel.
You have to add AIR.
Another 12.625 gallons of water!
A tandem axle (ten wheel) dump truck can typically weigh between 20,000 and 25,000 lbs., depending on make, model, steel or aluminum dump body, etc.
Depends on make, model and options. Average empty weight is 15,000 lbs.
The weight of empty bottles can vary based on their size and material. For example, a standard empty plastic bottle (like a 500ml bottle) typically weighs around 10-15 grams. Therefore, it would take approximately 67,000 to 100,000 empty plastic bottles to make a ton. For glass bottles, which weigh more (around 300 grams for a standard bottle), it would take about 3,333 empty glass bottles to make a ton.