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Unit 4 test
| Question | Answer |
|---|---|
| Work | |
| A hiker climbs a 50-meter hill while carrying a 10 kg backpack. Calculate the work done assuming his acceleration is equal to the force of gravity. | |
| A person lifts a 50 N box 2 meters in 4 seconds. What is their power used? | |
| If a crane does 360 J of work in 1 minute, how much power is used? | |
| What is the Law of Conservation of Energy? Why is it important to keep in mind? | |
| What is potential energy? | |
| What three factors give an object more potential energy? | |
| A skier at the top of a 20-meter hill has a mass of 50 kg. What is their gravitational potential energy? | |
| What two factors give an object more kinetic energy? | |
| If you double an object’s mass, how much does this increase kinetic energy? Velocity? | |
| Define thermal energy | |
| Chemical energy | |
| Nuclear energy | |
| Sound energy | |
| Electromagnetic energy | |
| Electrical energy | |
| Radiation definition | |
| What makes sound energy different from electromagnetic energy if they are both waves? | |
| 7 different types of waves | |
| What things produce infrared waves? | |
| What types of energy transfer take place inside a nuclear fission reactor? | |
| If a Calorie is approximately 4,200 Joules of energy, how many Joules of chemical potential energy are in a 20 Calorie granola bar? If we use all of the energy from that granola bar, how far would we be able to push a 20 N block? | |
| Gasoline is burned in a car to make it move What types of energy are used? | |
| Batteries in a flashlight produce light What types of energy are used? | |
| Water moves through a water mill to produce electricity What types of energy are used? | |
| Stored energy waiting to be used | |
| Height, mass, gravity | |
| Velocity and mass | |
| Transfer of heat Hot to cold | |
| Electromagnetic waves | |
| Moving electrons that power things | |
| Transfer of energy through waves, not direct | |
| Sound is through vibration, and electromagnetic is moving electrons. | |
| Radio, microwave, gamma, infared, visible, x-ray, ultraviolet | |
| Applying force that makes something move | |
| Stored in bonds between atoms | |
| Stored in the root of an nucleus | |
| Vibrational movement through substances in waves | |
| Thermal into electrical | |
| 4900J | |
| 25W | |
| 360W | |
| Energy cannot be created nor destroyed, only transformed from one form to another. | |
| 980J | |
| Mass=twice as large Velocity=quadruples it | |
| Heat from fireplace, tv remote controls | |
| 84,000J 4200m | |
| Chemical, thermal, kinetic | |
| Electrical, electromagentic, thermal | |
| Mechanical, electrical, radiant |
Created by:
Emery1!