International System of Units (SI Units) on Physics related Questions and Answers

Question :   The bar used for defining the standard metre at the International office of weights and measures at Sevres near Paris, is composed of 1. 90% platinum and 10% iridium 2. 70% platinum and 30% iridium 3. 80% platinum and 20% iridium 4. 60% platinum and 40% iridium Answer :   1 - 90% platinum and 10% iridium