The density of lead is 1.13 ✕ 104 kg/m3 at 20.0°c. find its density (in kg/m3) at 143°c. (use α = 29 ✕ 10−6 (°c)−1 for the coefficient of linear expansion. give your answer to at least four significant figures.)

Agas occupies 475 cm^3 at 313k. find its volume at 367k. you must show all of your work to receive credit. be sure to identify which of the gas laws you will be using

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]