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Conversions & Equations Renew & Non- Renew Solving Problems Thermal Energy Final Jeopardy Jeopardy Board

Conversions / Equation? BoardAnswer If you are given mass and height what are you trying to solve for AND what equation should you use?

Board Conversions / Equation? You are solving for GPE GPE = mgh Gravitational Potential Energy = Mass x 9.8m/s 2 x Height

BoardAnswer Conversions / Equation? Which process best shows the conversion of solar energy to chemical energy? A Prevailing winds causing windmills to spin B Green plants making their own food C Uranium producing heat to make steam D Tides generating electricity

Board Conversions / Equation? Which process best shows the conversion of solar energy to chemical energy? A Prevailing winds causing windmills to spin B Green plants making their own food C Uranium producing heat to make steam D Tides generating electricity

BoardAnswer Conversions / Equation? If you are given height and weight what are you trying to solve for AND what equation should you use?

Board Conversions / Equation? N 3 meters You are solving for PE PE = wh

BoardAnswer Conversions / Equation? Jack is mowing the grass with a gasoline lawn mower while listening to his iPod. Of the 6 forms of energy, which form is NOT represented in this example?

Board Conversions / Equation? Mechanical - Jack is mowing (walking) Radiant – Sound from lawnmower, music Chemical – gas, food, battery Heat – Motor heating up Electrical – iPod (electrical to sound) Nuclear - NONE

BoardAnswer Conversions / Equation? If you are given mass and velocity what are you trying to solve for AND what equation should you use?

Board Conversions / Equation? You are solving for KE KE = mv 2 2 Or KE = 1/2mv 2

BoardAnswer Renewable / Non-Renewable Energy from the earth Advantage: endless supply in certain areas Disadvantage: only works in certain areas

Board Renewable / Non-Renewable Geothermal Uses heat energy from under the earth’s surface in volcanic regions.

BoardAnswer Renewable / Non-Renewable Energy from fossil fuels Advantage: ready made fuel Disadvantage: contributes to acid rain

Board Renewable / Non-Renewable Oil and Coal from plants and animals from millions of years ago

BoardAnswer Renewable / Non-Renewable Name 1 advantage and 1 disadvantage of Hydroelectric Energy

Board Renewable / Non-Renewable Advantages: Creates water reserves and energy supplies Disadvantages: Extremely expensive and can force flooding in some areas

BoardAnswer Renewable / Non-Renewable Name 1 advantage and 1 disadvantage of Disposable Batteries

Board Renewable / Non-Renewable Advantages: Long shelf life, Cheap and Common, Operates a long time, Good at resisting leaks, Easily replaceable Disadvantages: Poor performance under heavy use, Possible Explosions, Environmentally unsafe, Use and replace

BoardAnswer Renewable / Non-Renewable Name 3 of the 4 Renewable Energy Sources and 3 of the 4 Non-Renewable Energy Sources we discussed in class.

Board Renewable / Non-Renewable Renewable Hydroelectric Wind Solar Geothermal Non-Renewable Coal Oil Natural Gas Nuclear

BoardAnswer Solving Problems When solving GPE = mgh and you are given 100kg and 50m, what is the g ?

Board Solving Problems Acceleration of objects due to gravity on earth is

BoardAnswer Solving Problems A car is traveling with a velocity of 6 m/s and has a mass of 120kg. Calculate the energy of the moving car.

Board Solving Problems KE M = 120kg KE = 2160 Joules v = 6m/s KE = mv 2 2 KE = 120kg (6m/s) 2 2 KE = 120kg (36m/s 2 ) 2 KE = 4,320kg.m/s 2 2 SolutionSubstitute including unitsEquations NeededUnknownGiven

BoardAnswer Solving Problems Roman lifts a 18N shot put is lifted to a height of 2 meters in the shot put ring before he begins this spin to release the shot. What is the energy of this object?

Board Solving Problems Potential Energy W = 18N GivenUnknownEquations Needed Substitute including unitsSolution PE = 36 Joules h = 2m PE = whPE = 18N x 2m

BoardAnswer Solving Problems A 100 kg roller coaster is sitting on top of a hill that is 15 meters high. What is the roller coaster’s energy?

Board Solving Problems GPE M = 100kg GivenUnknownEquations Needed Substitute including unitsSolution PE = 14,700 Joules h = 15m GPE = mghGPE = 100kg X 9.8m/s 2 x 15m

BoardAnswer Solving Problems What has more energy, Object A with a 20 kg mass moving at 9m/s or Object B with a 40 kg mass 25m above the floor? This can be tricky if you don’t pay attention….

Board Solving Problems Object A with a 20 kg mass moving at 9m/s KE = ½ mv 2 KE = (.5) (20kg)(9m/s) 2 KE = (10kg) (81m/s 2 ) KE of Object A = 810J Object B with a 40 kg mass 25m above the floor GPE = mgh GPE = (40kg)(9.8m/s 2 ) (25m) GPE of Object B= 9800J OBJECT B has more ENERGY

BoardAnswer Thermal Energy- 100 A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by —

Board Thermal Energy A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by — Conduction

BoardAnswer Thermal Energy Heat convection occurs in gases and liquids. Heat convection does not occur in solids because solids are unable to — A absorb heat by vibrating B transfer heat by fluid motion C emit radiation by reflecting light D exchange heat by direct contact

Board Thermal Energy Heat convection occurs in gases and liquids. Heat convection does not occur in solids because solids are unable to — A absorb heat by vibrating B transfer heat by fluid motion C emit radiation by reflecting light D exchange heat by direct contact

BoardAnswer Thermal Energy Water is heated in a beaker. A difference in the density of the cooler water and the warmer water causes — A conduction of heat B convection currents C insulation at the top level D radiation from bottom to top

Board Thermal Energy A conduction of heat B convection currents C insulation at the top level D radiation from bottom to top Water is heated in a beaker. A difference in the density of the cooler water and the warmer water causes —

BoardAnswer Thermal Energy – 400 A solar heater uses energy from the sun to heat water. The heater ’ s panel is painted black to — A improve emission of infrared radiation B reduce the heat loss by convection currents C improve absorption of infrared radiation D reduce the heater ’ s conducting properties

Board Thermal Energy A solar heater uses energy from the sun to heat water. The heater ’ s panel is painted black to — A improve emission of infrared radiation B reduce the heat loss by convection currents C improve absorption of infrared radiation D reduce the heater ’ s conducting properties

BoardAnswer Thermal Energy Wood chips, foam and wool may be categorized as:

Board Thermal Energy Wood chips, foam and wool may be categorized as: Insulators

Final Jeopardy Category Board

Final Jeopardy Question Answer At which point is the ball’s potential energy greatest? At which point is the ball’s kinetic energy greatest ?

Board Final Jeopardy Question At which point is the ball’s potential energy greatest? PE – At Position 2 At which point is the ball’s kinetic energy greatest? KE – At Position 3