Chapter 1 Flashcards
What are the 7 stores of energy
Kinetic Thermal Elastic potential Gravitational potential Chemical Magnetic Electrostatic
What are the 4 energy transfers?
Heating by particles
Hearing by radiation
What is the symbol and word equation for work done?
Work done = force x distance
W = F x S
(J) = (N) x (S)
What’s the symbol and word equation for elastic potential?
Energy = 1/2 spring constant x extension^2 Ee = 1/2 k x e^2 (J) = (N/m) x (m)
What is the symbol and word equation for weight?
Weight = mass x gravitational field strength W = m x g (N) = (kg) x (N/kg)
What is the symbol and word equation for kinetic energy?
Energy (kinetic) = 1/2 mass x velocity^2
Ek = 1/2 m x v^2
(J) = (kg) x (m/s)
What is the symbol and word equation for gravitational potential energy?
Energy (gravitational) = weight x height
Eg = mg x h
(J) = (kg)(N/kg) x (m)
What is the word and symbol equation for power?
Power = energy / time P = E / T (W) = (J) x (S)
What is the word equation for efficiency?
Efficiency = useful output / total input
What are the prefixes?
kJ MJ mJ
kJ= 1000 J MJ= 1000 000 J mJ= 0.001 J
What is the principal of conservation of energy?
Energy cannot be created or destroyed
only transferred from one store to another