ASTR 1010 Lecture Notes - Lecture 5: Tidal Locking, Thermal Energy, Angular Momentum

• School: University of Georgia
• Department: Astronomy
• Course: ASTR 1010
• Professor: Shelton

Document Summary

Angular momentum (rotational version of momentum) = mass x velocity x radius. = m x v x r if velocity points perpendicular to radius, then. Slowest m x v(subinterval p) x r(subinterval p) Radius is smaller m x v(subinterval a) x r(subinterval a) *kepler"s equal area, equal time same as angular momentum* Distance = velocity x time mv(subinterval p)r(subinterval p) = mv(subinterval a)r(subinterval a) Mv(subinterval p)r(subinterval p) = mv(subinterval a)r(subinterval a) D(subinterval p)r(subinterval p) = d(subinterval a)r(subinterval a) Area of triangle equal area, equal time d(subinterval a) = v(subinterval a)t. Center of mass x d(subinterval p) = v(subinterval p)t. Friction between water and earth slows earth down by 1 second every 50,000 years. If the moon had water and slowed down a little, we"d see one point forever. Energy can be converted from one type to another. Temperature not direct measure of heat content; proportional to velocity^2. Tepid in oven (wouldn"t bake pie very well)