If the mass of metal sample are 10.138 g in initial temperature 49°c , and the mass for water in calorimeter 18.537g , in temperature of water in calorimeter 28°c . and the final temperature of water and metal is 31°c
calculate the changes in temperature of water and of the metal?

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Why are people not able to scuba dive in the deep part of the ocean

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