Fill it up with water, dry the shell off and pour the water into some sort of measuring device? Or.. Since water weighs about 1kg/liter you could pour water into the shell and then weigh the water to know the volume..
you would weigh it by using grams
They would weigh 112.5lbs.
What would weigh 80kg
If you weighed 100 lbs on Earth you would weigh 112.5 lbs on Neptune.See related for how much you would weigh on other planets.
Well they could be allergic to prawns (I am).
Normally prawns would not, but it depends on the environment where the prawns were raised. If their environment is contaminated with something then they will also become contaminated.
An averaged sized man would weigh in any range from 140 pounds to 150 pounds. Any weight that is over 165 pounds is considered overweighted for a normal sized human unless the human has a lot of muscles.
Depends what type of rodent but probably about a pound.
Most fish do. I would say that all fish do, but it seems on Earth there is always an exception because there are so many different types of fish in the world.
How much a plum weighs depends upon its size. A medium sized plum with a diameter of 2 inches would weigh about 80 grams.
A medium-sized apple, a deck of playing cards, or a light bulb are common household items that weigh around 100 grams.
If the Earth kept the same mass that it has now, but that same mass got packed into a sphere with 1/2 the present radius, then a man who weighs 100 pounds on Earth now would weigh 400 pounds on the half-sized Earth. If the outer shell of the Earth's mass were removed and discarded, leaving only the mass that's presently inside 1/2 of the Earth's radius, then a man who weighs 100 pounds on Earth now would weigh 50 pounds on the half-sized Earth. (Assuming that the Earth's mass/density is homogeneously distributed.) (This is all my opinion & I could be wrong.)
An average-sized apple typically weighs around 150g, so roughly two-fifths of an apple would weigh 60g.
The weight of a cat skeleton would vary widely because of the size of the animal. However, an average sized cat skeleton may weigh up to 5 pounds.
Ant-Man's weight varies depending on his size. When he shrinks, he retains the density and weight of a normal-sized person, so he would weigh the same as he does at his regular size.
Osmium is much denser than an elephant. Which is heavier depends on how much elephant and how much osmium you're talking about. An elephant-sized pile of osmium would weigh over 20 times as much as an elephant-sized elephant would.