Physics Unit 3: Winter Chills

False (B)

60%

<p>Energy Star</p> Signup and view all the answers

<p>Energy-Efficient Technology = Appliances designed to use less energy Smart Control Systems = Adjust energy consumption based on usage patterns Better Insulation = Reduces heat loss in appliances Regular Maintenance = Ensures appliances run efficiently for longer</p> Signup and view all the answers

<p>Upgrade appliance size (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>LED lighting or inverter motors</p> Signup and view all the answers

<p>Consumed Energy</p> Signup and view all the answers

<p>Implementing smart controls (C)</p> Signup and view all the answers

<p>Power drawn by appliances when turned off (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>It allows users to easily cut off power to multiple devices, reducing phantom load.</p> Signup and view all the answers

<p>heat</p> Signup and view all the answers

<p>Thermal Energy = Movement of particles inside an object Temperature = Measure of thermal energy Heat = Transfer of thermal energy from high to low</p> Signup and view all the answers

<p>It will increase. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>They would have the same temperature because they reach thermal equilibrium with their surroundings.</p> Signup and view all the answers

<p>renewable</p> Signup and view all the answers

<p>It maximizes energy efficiency from renewable sources. (B)</p> Signup and view all the answers

<p>Potential energy (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>JOULES</p> Signup and view all the answers

<p>kinetic energy</p> Signup and view all the answers

<p>Potential Energy = Energy at rest Kinetic Energy = Energy in motion Thermal Energy = Energy related to heat Electrical Energy = Energy from electric charges</p> Signup and view all the answers

<p>The ratio of useful energy output to total energy input (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Electrical energy is transformed into radiant and thermal energy.</p> Signup and view all the answers

<p>consumed energy</p> Signup and view all the answers

<p>It is transformed into kinetic energy. (D)</p> Signup and view all the answers

<p>It is transformed into potential energy. (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Useful energy / Consumed energy × 100</p> Signup and view all the answers

<p>500</p> Signup and view all the answers

<p>A light bulb that converts 90% of energy into light. (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Useless energy that is lost as heat or sound.</p> Signup and view all the answers

<p>280000</p> Signup and view all the answers

<p>To reduce energy costs and conserve resources. (A)</p> Signup and view all the answers

The percentage of input energy converted into useful work (e.g., cutting grass) by a lawnmower engine.

Calculating energy efficiency involves dividing the useful energy output by the total energy consumed and multiplying by 100 to get a percentage.

Technologies designed to reduce energy consumption in appliances, like LED lights, inverter motors.

Systems that regulate appliance energy consumption based on usage patterns, leading to reduced energy waste.

Improving insulation in refrigerators, ovens, and water heaters reduces heat loss and lowers energy consumption.

Keeping appliances clean and well-maintained improves efficiency, reducing energy consumption, and often increasing performance as well.

Specific settings on certain appliances that can help decrease energy usage.

A widely recognized energy efficiency certification applied to various electrical appliances.

Setting appliances to specific temperatures that balances effectiveness with energy efficiency.

Energy used by an appliance even when it's not actively in use.

Energy cannot be created or destroyed, only transformed or transferred.

How effectively energy input is changed into useful output without waste, expressed as a percentage.

Energy used for performing a desired task; the output energy.

The total energy used, including both useful and wasted energy.

Energy that is lost or wasted as heat or sound during a process.

Changing energy from one form (e.g., kinetic) to another (e.g., potential).

The energy of motion.

Stored energy due to position or condition.

An idealized system where no energy is lost to the surroundings.

A system in which some energy is always lost to the surroundings as heat or sound.

The ability of an object to do work or store work.

The force applied to an object over a distance.

Joules (J)

Moving energy from one object to another.

Heat is the total energy of all the particles in an object; Temperature is the average energy of those particles.

The total amount of movement energy particles have inside something.

A measure of the average movement energy of particles in a substance.

The transfer of Thermal energy from a high-energy area to a low-energy area.

Because thermal energy is transferred from your hand (high energy) into the ice (low energy). This is an example of heat.

Materials have different abilities to transfer heat. Metal conducts heat well, so it feels colder than plastic at the same temperature.

The substance gains energy, causing its particles to move faster.

Thermal energy is the total energy of all the particles in an object, while temperature is the average energy of those particles.

Heat transfer allows energy to flow between objects, affecting their temperatures and creating different physical processes.

Yes, if the objects have different masses, they will have different thermal energies even if their temperatures are the same.

Thermal energy is directly related to the movement of particles in a substance. As thermal energy increases, particle motion increases.