The energy density in a pellet of algae is determined by a bomb calorimetry technique, in which the food is burned (in an oxygen rich environment) and the amount of heat transfer ismeasured. How many joules of energy per kilogram are there in dried algae if when burning a5.00 g algae pellet, and transferring this energy to 0.500 kg of water held in a 0.100 kg aluminumcup, a 54.9oC temperature increase is observed? The specific heat of water is 4186 J/(kg K) andthe specific heat of aluminum is 900 J/(kg K)

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation