physology Flashcards
What is the name for the energy store related to heat??????
thermal
What is the name for the energy store related to movement???!!?!?!?!
kinetic
What is the name for the energy store related to stretching and rebound??!”?!??
elastic potential
What is the name for the energy stored in foods and fuels?!?!?!?!?!
chemical
Is the calculation for efficiency of energy,
A- efficiency = total energy output ÷ useful energy output
B- efficiency = total energy in ÷ useful energy out
c- efficiency = useful energy out ÷ total energy in
c
What is the amount of mains electrical energy transferred measured in?
A - kw (kilowatts)
B- kWh (kilowatts/hour)
C- amp-hr (amps/hour)
D- V (volts)
b
What is the equation for energy transferred by an electrical appliance?
A- Energy = Time/Power
B- Energy = Power x Time
C- Power = Energy/Time
b
A 2 kW electric fire is switched on for 30 minutes. How many Units of electricity does it use?
1
In a certain device, 25% of the energy is usefully transferred. The energy efficiency of this device is:
25%
What is voltage measured in?
Volts
What is electrical power measured in?
Watts
What is resistance measured in?
Ohms
What is the wasted energy output in a traditional lamp?
Heat
Why is wasted energy not as useful?
A- It is destroyed
B- It gets too hot to use
C- It spreads out
c
Why is an energy transfer never 100% efficient?
Friction
