Water is boiled in a 1-l coffee maker with an immersion-type electric heating element at atmospheric pressure. it was observed that 12-l has evaporated in 13 min once boiling starts. a) if the heating element is rated based on power required to evaporate water, determine the rating of the heating element. b) for the same heating element, how long will it take to raise the 1-l temperature from 18 °c to boiling point at the same atmospheric pressure? take liquid water density pair = 1000 kg/m & specific heat pwater = 4.18 kj/(kg: "k).

If equal masses of the listed metals were collected , which would have a greatest volume ? a. aluminum 2.70,b.zinc7.14,c.copper 8.92,d.lead 11.34

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line