It's about one-three-hundred-fiftieth as heavy as a Car
In other words, 0.00000000500 megatonnes is 0.003027 times the weight of a Car, and the weight of a Car is 330.40 times that amount.(for 2009 Ford Taurus) (curb weight)
A 2009 Ford Taurus weighs 0.0000016520 megatonnes. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 0.0000003860 megatonnes.
It's about one-four-hundredth as heavy as a Giraffe
In other words, 0.00000000500 megatonnes is 0.00259 times the weight of a Giraffe, and the weight of a Giraffe is 386 times that amount.(Giraffa camelopardalis reticulata) (adult, male, maximum of range)
An adult, male giraffe can weigh up to 0.000001930 megatonnes. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day.
It's about one-four-hundredth as heavy as a Rhinoceros
In other words, 0.00000000500 megatonnes is 0.0024 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 420 times that amount.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 0.00000210 megatonnes. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about 400 times as heavy as a Battery (AAA)
In other words, 0.00000000500 megatonnes is 420 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 0.0024 times that amount.(Alkaline)
An "AAA" size battery weighs 0.0000000000120 megatonnes. Batteries are named by the American National Standards Institute (ANSI) Committee C18 and AAA batteries were given their name because they were smaller than the "AA" and "A" size batteries which were invented first.
It's about one-five-hundred-fiftieth as heavy as The Tongue of a Blue Whale
In other words, the weight of The Tongue of a Blue Whale is 530 times 0.00000000500 megatonnes.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 0.00000270 megatonnes. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about 700 times as heavy as an Eye (Human)
In other words, the weight of an Eye (Human) is 0.0014 times 0.00000000500 megatonnes.(adult)
A fully developed eye (in a person over the age of thirteen), weighs about 0.00000000000710 megatonnes. The pupil of the eye varies depending on the amount of light it is exposed to, but typically measures about 4 mm across.
It's about one-seven-hundred-fiftieth as heavy as a Hippopotamus
In other words, 0.00000000500 megatonnes is 0.00133 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 752 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 0.000003750 megatonnes. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).