Physics: Cost Effectiveness of Light Bulbs

After a brief introduction to electric power, I tasked students with figuring out which of several light bulbs is the most cost effective. I provided them with the cost and estimated lifetime for each bulb and the current rate the local electric company is charging, along with some Kill-A-Watts they could use to take some measurements.

Calculated costs to run for 15,000 hours

Calculated costs per day

Chemistry: Reversible Reactions

After a quiz on limiting reactants, students used the textbook to start defining reversible reaction and equilibrium.