It's about 250 times as heavy as a Battery (AAA)
In other words, the weight of a Battery (AAA) is 0.0042 times 0.00000000290 megatonnes.(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 400 times as heavy as an Eye (Human)
In other words, 0.00000000290 megatonnes is 410 times the weight of an Eye (Human), and the weight of an Eye (Human) is 0.0024 times that amount.(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 500 times as heavy as a Quarter
In other words, 0.00000000290 megatonnes is 511.50 times the weight of a Quarter, and the weight of a Quarter is 0.001955 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 0.000000000005670 megatonnes each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
It's about one-five-hundred-fiftieth as heavy as a Car
In other words, 0.00000000290 megatonnes is 0.001755 times the weight of a Car, and the weight of a Car is 569.80 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 600 times as heavy as a sheet of Paper
In other words, 0.00000000290 megatonnes is 580 times the weight of a sheet of Paper, and the weight of a sheet of Paper is 0.0017 times that amount.(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
The weight of a ream (500 sheets) of 0.00000000910 megatonnes, 8.5 inch x 11 inch paper is 0.00000000200 megatonnes, each sheet weighing 0.00000000000500 megatonnes. Paper of this size has a thickness of 0.004 caliper (0.1 mm).
It's about one-six-hundred-fiftieth as heavy as a Giraffe
In other words, the weight of a Giraffe is 667 times 0.00000000290 megatonnes.(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 700 times as heavy as a Die (Dice)
In other words, 0.00000000290 megatonnes is 710 times the weight of a Die (Dice), and the weight of a Die (Dice) is 0.0014 times that amount.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 0.00000000000410 megatonnes. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.