Example
Cards (21)
- How is the efficiency of an energy transfer calculated?
- What does efficiency represent in an energy transfer process?
- What is the equation for efficiency?
- What do Sankey diagrams illustrate in energy transfer?
- In what units is total useful output energy measured?
- What is the unit for total input energy?
- What happens to the units when calculating efficiency?
- How can efficiency be expressed as a percentage?
- If an oven uses 80 K of electrical energy and supplies 30 K of thermal energy, what is the efficiency?
- What is the first step in calculating the efficiency of the oven?
- How do you substitute values into the efficiency formula?
- What is the input energy of the oven in the example?
- What is the useful output energy of the oven in the example?
- How can efficiencies be calculated using power?
- What units are used for both useful output and total input power?
- What does the efficiency formula become when dividing by time?
- If a low energy light bulb is 65% efficient and requires an input power of 12 Watts, what is the useful output power?
- How do you convert efficiency from a percentage to a decimal?
- What is the rearranged formula to find useful output power?
- How do you calculate the useful output power from the rearranged formula?
- What features does the Launchpad learning platform offer for GCSE revision?