It's about 2,000,000 times as heavy as a Golf Ball.
In other words, 100 tons is 1,975,000 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.00000050630 times that amount.(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 0.000050630 tons. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about 1,500,000 times as heavy as a Tennis Ball.
In other words, 100 tons is 1,570,000 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.0000006370 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.00006360 tons. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about 1,500,000 times as heavy as a Battery (C).
In other words, the weight of a Battery (C) is 0.000000710 times 100 tons.(Alkaline)
A "C" size battery weighs 0.0000720 tons. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 950,000 times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.000001000 times 100 tons.(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 0.0001 tons. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 0.250 tons.
It's about 650,000 times as heavy as a Battery (D).
In other words, 100 tons is 672,000 times the weight of a Battery (D), and the weight of a Battery (D) is 0.000001490 times that amount.(Alkaline)
A "D" size battery weighs 0.000149 tons. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about 600,000 times as heavy as a Baseball.
In other words, 100 tons is 624,390.243902440 times the weight of a Baseball, and the weight of a Baseball is 0.00000160156250 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.00015625 tons and 0.0001640625 tons. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
It's about 550,000 times as heavy as a Billiard Ball.
In other words, 100 tons is 556,521.739130430 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.0000017968750 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 0.000171875 tons and 0.0001875 tons. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.