Atravel mug of 91∘c coffee is left on the roof of a parked car on a cold winter day. the temperature of the coffee after t minutes is given by h=91(2)−t/14. after how many minutes will the coffee be only lukewarm (30∘c)?

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)]

Which of the following is not true about the atomic model of substances?

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn