It's about 2,000 times as heavy as a Puck (Hockey).
In other words, 343 kilograms is 2,104.16851281840 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.00047524710778062 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 0.15592237718750 kilograms and 0.170097138750 kilograms. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about 2,500 times as heavy as a Baseball.
In other words, 343 kilograms is 2,360.77442901580 times the weight of a Baseball, and the weight of a Baseball is 0.00042358981345664 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.1417476156250 kilograms and 0.148834996406250 kilograms. 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 2,500 times as heavy as a Battery (D).
In other words, 343 kilograms is 2,540 times the weight of a Battery (D), and the weight of a Battery (D) is 0.000394 times that amount.(Alkaline)
A "D" size battery weighs 0.1350 kilograms. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about 3,500 times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.00028 times 343 kilograms.(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 0.094 kilograms. 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 272 kg.
It's about one-four-thousandth as heavy as a Tree (Sierra Redwood).
In other words, 343 kilograms is 0.00026 times the weight of a Tree (Sierra Redwood), and the weight of a Tree (Sierra Redwood) is 3,800 times that amount.(a.k.a. Giant Sequoia, a.k.a. Sierran redwood, a.k.a. Wellingtonia, a.k.a. "Big Tree", Sequoiadendron giganteum)
The weight of wood in a Giant Sequoia is 1,300,000 kilograms. General Sherman, a specimen in Sequoia National Park in Visalia, California, is the largest tree in the world by volume, with an estimated weight of about 1,900,000 kilograms.
It's about 5,500 times as heavy as a Battery (C).
In other words, the weight of a Battery (C) is 0.00019 times 343 kilograms.(Alkaline)
A "C" size battery weighs 0.065 kilograms. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 6,000 times as heavy as a Tennis Ball.
In other words, 343 kilograms is 5,940 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.000168 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.0577 kilograms. 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.