Physics 1: Energy Flashcards
(14 cards)
List some different types of energy
Thermal Kinetic Elastic Potential Gravitational Potential Electrical Energy Light Energy Sound Energy Chemical Energy
What is the formula for kinetic energy ?
Ke = 1/2 x m x v ^2
m= mass (kg) v = speed (m/s)
What is the formula for gravitational potential energy ?
Ge = m x g x h
m = mass g = gravitational field strength (N/Kg) (9.8-10) h = height
What is the formula for elastic potential energy?
Ee = 1/2 x k x e^2
k = is spring constant e = extension
What is the definition of specific heat capacity?
Energy required to increase the temperature of 1kg of a substance by 1 degree C
What is the formula for working the energy change with specific heat capacity
E = m x c x change T
m= mass c = specific heat capacity T = change in temperature
What is the formula for work done?
Work done = F x D
F= force D= distance (meters)
What is the formula for Power
Power = Energy/Time or Work Done/time
What is the unit of Power
Watts
Can energy be created or destroyed
No- it can only be converted from one form to another
What are some non-renewable sources of energy?
Fossil fuels (gas, coal and oil) Nuclear Energy
List some sources of renewable energy
Wind Solar Geothermal Tidal power Hydro-electric Biomass
What are some issues with fossil fuels
Bad for environment - greenhouse gases + soot
Non-renewable so will run out
What are some issues with renewable energy
Location specific
Weather specific
Visual/sound pollution
