# Ch 11: Momentum, Energy, Pressure, Temperature & Gas

Watch online science video lessons to learn about kinetic and mechanical energy, orbital momentum and other topics related to the conservation laws of astronomy.

## Conservation Laws in Astronomy - Chapter Summary and Learning Objectives

Now that you've studied Newton's laws of motion, use this chapter to examine the physics behind what actually makes the world go around. Instructors outline different energy types and explain the relationship between momentum and force, so you can develop an understanding of laws governing the behavior of objects in orbit. By the time you reach the end of this chapter, you should be able to do the following:

• Apply the momentum conservation principle to linear, orbital and rotational motion
• Differentiate between potential, kinetic, thermal and mechanical energy
• Describe gravitational potential energy and mass-energy
• Convert between Kelvin and Celsius temperatures
• Interpret a phase change diagram

Video Objectives
Linear Momentum: Definition, Equation and Examples Explore the relationship between momentum, mass and velocity. Practice solving the formula used to calculate linear momentum.
Conservation of Linear Momentum: Formula and Examples View real-life applications of the law of conservation of momentum.
Conservation of Orbital and Rotational Angular Momentum Apply conservation principles to orbital and rotational motion.
What is Energy? - Definition and Significance in Nature Learn where energy comes from. Get examples of thermal and mechanical energy.
Kinetic Energy to Potential Energy: Relationship in Different Energy Types Find out how potential energy is converted into the kinetic energy required for work.
What is Mechanical Energy? - Definition & Examples Apply the law of conservation to mechanical energy within a system. Examine the effect of outside forces acting on a system.
What is Thermal Energy? - Definition & Examples Examine the energy type resulting from the movement of particles within an object.
Temperature Units: Converting Between Kelvin and Celsius Compare the Kelvin and Celsius temperature scales. Learn how to convert between these two measurements.
Changes in Heat and Energy Diagrams Differentiate between heat and temperature. Explore diagrams demonstrating their relationship during a phase change.
Potential Energy in Astronomy Examine the applications of gravitational potential energy and mass-energy in astronomy.

Final Exam
Chapter Exam

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