No Loose Ends

Physics A and B reviewed their latent heat work, then had a general review for the Chapter 9 exam. Here's a couple of other sample conservation of thermal energy problems for you to chew on (look up specific heat values in your textbook):

1. A 1.25 kg block of silver is heated to 450° C then dropped into a bowl filled with 3.50 kg of water. If the equilibrium temperature of the system is 75° C, what was the water's initial temperature? (Ans: 67.5° C)


2. A barrel filled with 50.0 kg of water at 20° C, reaches a temperature of 45° C when an iron pot is added to it. If the iron's initial temperature was 345° C, what is the pot's mass? (Ans: 38.9 kg)

Intro Physics also worked with latent heat, reviewing some concepts before turning attention to the mathematics of the topic. The problems on which you are working will give you practice both with the latent heat formula and the specific heat formula. We'll go over these tomorrow before taking a deeper look at phases and phase changes.

Honors Physics reviewed their properties of waves lab and then had a general review for tomorrow's Chapter 11 exam. On Friday, it's on to sound!