You want to make a retangular box that weighs 2.0 pounds and floats on water. The width and height of the box are each 5.0 cm long. Choose the minimum length of the box that will keep it afloat on the water. Assume the density of the water is 1.0g/cm^3. Show all work and explain in words why you chose your answer. A) 180 cm B) 360 cm C) 9.7 cm D) 7.3 cm E) 38 cm

When balancing a chemical equation:

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)]

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?