Daniel has a sample of pure copper. It's mass is 89.6 grams, and it's volume is 10 cubic centimeters (cm^3). What is the density of the sample?

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?

Can someone answer my last question i posted? on my last post? my hw is due tomorrow and i’m confused.

Do students need summer development? for 108 randomly selected college applicants, the following frequency distribution for entrance exam scores was obtained. construct a histogram, frequency polygon, and ogive for the data. (the data for this exercise will be used for exercise 13 in this section.)