| Title | Author | Created | Published | Tags | | --------------------- | ---------------------------- | ----------------- | ----------------- | ---------------------- | | Test 2 Review Answers | <ul><li>Jon Marien</li></ul> | February 11, 2025 | February 11, 2025 | [[#classes\|#classes]] | # **Creativity in Physics Test 2 Review** ## **Energy, oscillations, and momentum** 1. What is an elastic collision? 1. **Kinetic energy is conserved** 2. What would be an example of something undergoing simple harmonic motion? 1. **pendulum** 3. Fill in the blank; ‘Only forces _________ to the direction of motion do work.’ 1. **Parallel** 4. If a 10 kg cannonball and a 0.01 kg bullet have the same momentum, then what could you say about their respective velocities? 1. **The bullet would travel at a much higher velocity compared to the cannonball.** ## **Fluids** 1. What is Pascal’s principle? 1. **The pressure in a fluid is equally transmitted through all parts of that fluid** 2. Who was the first scientist to examine the nature of floating objects? 1. **Archimedes** 3. What is Bernoulli’s principle? 1. **Faster the fluid, lower the pressure** 4. For a fluid in motion, what are the two main types of flow? 1. **Laminar and turbulent** ## **Heat** 1. At what temperature are the Celsius and Fahrenheit scales the same? 1. **-40** 2. What is absolute zero? 1. **0 kelvin and 0 kinetic energy of the molecules of a substance** 3. What are the three types of heat transfer? 1. **Conduction, convection, radiation** 4. What is the first law of thermodynamics? 1. **Energy can’t created or destroyed, only converted from one form to another** ## **Heat engines** 1. What is entropy? 1. **The measure of disorder or randomness** 2. What is the second law of thermodynamics? 1. **Whenever converting from one form of energy to another, heat is always produced.** 3. Why are perpetual motion machines physically impossible? 1. **They break either the first or second law of thermodynamics** 4. What are the three key features of a heat engine? 1. **High temperature heat/energy is added into the system, some of that heat/energy is converted into work, the remainder of that heat/energy flows out of system.**