It's about one-eight-hundred-fiftieth as heavy as The Space Shuttle
In other words, 3,000 ounces is 0.001 times the weight of The Space Shuttle, and the weight of The Space Shuttle is 830 times that amount.(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 2,500,000 ounces. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 700,000 ounces.
It's about 900 times as heavy as a Deck of Cards
In other words, 3,000 ounces is 900 times the weight of a Deck of Cards, and the weight of a Deck of Cards is 0.001 times that amount.(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 3.30 ounces. 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 8,000 ounces.
It's about one-one-thousandth as heavy as a Blue Whale
In other words, 3,000 ounces is 0.00081 times the weight of a Blue Whale, and the weight of a Blue Whale is 1,230 times that amount.(Balaenoptera musculus)
Blue whales weigh between 3,690,000 ounces. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.0353 ounces each.
It's about 1,500 times as heavy as a Battery (C)
In other words, 3,000 ounces is 1,300 times the weight of a Battery (C), and the weight of a Battery (C) is 0.0008 times that amount.(Alkaline)
A "C" size battery weighs 2.30 ounces. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 1,500 times as heavy as a Tennis Ball
In other words, 3,000 ounces is 1,470 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.0007 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 2.04 ounces. 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 one-one-thousand-five-hundredth as heavy as The Statue of Liberty (without base)
In other words, 3,000 ounces is 0.0006 times the weight of The Statue of Liberty (without base), and the weight of The Statue of Liberty (without base) is 1,600 times that amount.(a.k.a. Liberty Enlightening the World, a.k.a. La Liberté éclairant le monde) (total weight, including foundation)
The total weight of the Statue of Liberty — the Statue's copper and framework only, excluding the base — is roughly 4,900,000 ounces. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about one-two-thousandth as heavy as a House
In other words, 3,000 ounces is 0.00055 times the weight of a House, and the weight of a House is 1,830 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 5,500,000 ounces, 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 16,200 ounces.