You found a shiny rock and want to find out if its gold. the mass(weight) of the rock is 45 g. you put the rock in boiling water, and the you put it in a thermos together with 1.2 dl ethanol. the thermos has the high-capacity of 31 j/k. both ethanol and the thermos had the starting temperature of 18.0°c, and stabilize at 19.5°c after the rock is put in.

how can we use this information to determine if it's gold or not?

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

Which of the following is not a reason why shenzhen, china, is considered an emerging global city

Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.