It's about 2,000 times as heavy as a Battery (AA)
In other words, 50 kilograms is 2,100 times the weight of a Battery (AA), and the weight of a Battery (AA) is 0.00048 times that amount.(Alkaline)
An "AA" size battery weighs 0.024 kilograms. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.
It's about 2,500 times as heavy as a Mouse
In other words, the weight of a Mouse is 0.00042 times 50 kilograms.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 0.021 kilograms. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.
It's about one-three-thousandth as heavy as a House
In other words, 50 kilograms is 0.000321 times the weight of a House, and the weight of a House is 3,120 times that amount.(149 sq. m, single-level, unfurnished)
A 149 sq. m (1,600 sq. ft), single-story, unfurnished house (without extensive masonry) of the type commonly found in America would weigh approximately 156,000 kg, based on the weight of the included materials. In contrast, a yurt — a type of dwelling structure popular among nomadic peoples of East Asia — typically weighs less than 458 kg.
It's about 3,500 times as heavy as a Compact disc
It's about 4,000 times as heavy as a Battery (AAA)
In other words, 50 kilograms is 4,200 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 0.00024 times that amount.(Alkaline)
An "AAA" size battery weighs 0.012 kilograms. 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 7,000 times as heavy as an Eye (Human)
It's about 9,000 times as heavy as a Quarter
In other words, 50 kilograms is 8,818 times the weight of a Quarter, and the weight of a Quarter is 0.0001134 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 0.00567 kilograms each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.