you add sand because it absorbs water and making it lighter
The human brain weighs 8 pounds.
1 US quart of water weighs about 2.1 pounds.
On earth:1 kg mass weighs about 2.2 pounds. Something that weighs 6.4 pounds has mass of about 2.9 kilograms .On the moon:1 kg mass weighs about 0.36 pounds. Something that weighs 6.4 pounds has mass of about 17.8 kg.
the one with air filled in it
No it would be lighter Imagine a 2 party balloons, one filled with helium and one jUst blown up Which one weighs less?
a barrel of water weighs 20 pounds.
You could put a flexible bladder (balloon) filled with helium in it. The classic answer to this old question is: Fill it full of holes.
The M16A1 assault rifle weighs 6.5 pounds (2.9 kilograms) unloaded, lighter than the M16A2 which added a thicker barrel, bringing the weight to 7.18 pounds (3.26 kilograms).
He puts a hole in it.Or helium?
A barrel of oil contains 42 gallons. A gallon of light crude oil weighs approximately 7.27 pounds. Heavy crude oil weighs 7.61 pounds per gallon. Therefore a barrel of light crude oil weighs 305.34 pounds + the weight of the barrel. Heavy crude would weigh 319.62 pounds + the weight of the barrel.
Yes, the PSP 3000 weighs 1.5 pounds and the PSP 2000 weighs 1.9 pounds.
The barrel itself weighs 20 pounds. 10 gallons of water, therefore, weights 103.4 minus the weight of the barrel itself. 103.4-20 = 83.4 20 is twice as much as ten, so 83.4 * 2 = 166.8 pounds. If we add the barrel back in, we have a total weight of 166.8 + 20 = 186.8
Another 12.625 gallons of water!