– Density = mass/volume
– Increasing pressure always raises density. Increasing temperature usually lowers density. When water freezes, it is less dense than liquid water.

– Force of a spring = kx
k is a constant and x is the amount of stretch or compression.
– PE(spring) = 0.5kx^2

– Fahrenheit and Celsius
F = (9/5)C + 32
– Average human body temperature: 98.6 F

– Momentum = (mass)*(velocity)