It's about one-and-one-tenth times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.91 times 101.5 grams.(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 94 g. 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 230,000 grams.
It's about three-fourths as heavy as a Battery (D).
In other words, 101.5 grams is 0.752 times the weight of a Battery (D), and the weight of a Battery (D) is 1.33 times that amount.(Alkaline)
A "D" size battery weighs 135 g. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about seven-tenths as heavy as a Baseball.
In other words, 101.5 grams is 0.69859651470876 times the weight of a Baseball, and the weight of a Baseball is 1.4314414385776 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 141.747615625 g and 148.83499640625 g. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch).
It's about one-and-three-fifths times as heavy as a Battery (C).
In other words, the weight of a Battery (C) is 0.63 times 101.5 grams.(Alkaline)
A "C" size battery weighs 65 g. C batteries are typically used in medium-drain devices such as musical instruments.
It's about three-fifths as heavy as a Billiard Ball.
In other words, 101.5 grams is 0.62266211093607 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 1.6060074676724 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 155.9223771875 g and 170.09713875 g. 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.
It's about three-fifths as heavy as a Puck (Hockey).
In other words, 101.5 grams is 0.62266211093607 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 1.6060074676724 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 155.9223771875 g and 170.09713875 g. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about one-and-three-fourths times as heavy as a Tennis Ball.
In other words, the weight of a Tennis Ball is 0.568 times 101.5 grams.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 56.0 g to 59.4 g. 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.