Q1. If a human wants to eat about 10 000 kJ per day, approximate (to the nearest gram) the mass of phytoplankton that would be necessary to meet their daily energy requirements. Based on this value, about what proportion of her own body weight in phytoplankton will a 60 kg woman require eating over the course of a year, if this were her only source of energy?

Q2. A 25g sample of an alloy at 97C is placed in 50.g water at 16C. If the final temperature reached by alloy sample and water is 27C, what is the exact heat (cal/g C) of an alloy?