A Weighty Issue Ielts Reading Answers Portable Jun 2026

) explores the medical and social challenges of obesity. It specifically examines how scientific research shifted from behavioral therapy to biological causes, such as the discovery of the hormone Studocu Vietnam Summary of Answer Keys

| Statement | Answer | Explanation | |-----------|--------|--------------| | The International Prototype Kilogram was easily transportable. | | Paragraph A explicitly says “it was not portable.” | | The IPK’s mass changed slightly compared to its copies. | True | Paragraph B states it was found to be 50 micrograms lighter. | | Planck’s constant is different on the Moon. | Not Given | The passage says Planck’s constant is a constant of nature, but does not mention the Moon. | | Kibble balances are now as small as a smartphone. | False | Paragraph D says they are “large, expensive, and not yet portable in a handheld sense.” | a weighty issue ielts reading answers portable

– The solution arrived in 2019. The international community redefined the kilogram using a constant of nature: Planck’s constant. This new definition is inherently portable. Any laboratory with a Kibble balance (or watt balance) can measure mass directly from fundamental physics, without reference to a single, fragile artifact. ) explores the medical and social challenges of obesity