Physics 1: Energy Flashcards
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
