Old 5p and 10p coins in the uk were made from cupro-nickel. cupro-nickel is 75% copper and 25% nickel. new 5p coins and 10p coins in the uk are now made from nickel-plated steel and not from cupro-nickel. explain why.

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg