Energy Unit Test
Why is a roller coaster never capable of reaching the same height as the original hill
Gravity
Nuclear
Potential
Friction
A bunsen burner performs which energy transformations
Electrical energy -> elastic energy + sound energy
Chemical energy -> thermal energy + radiant energy
Chemical energy -> elastic energy + sound energy
Electrical Energy -> thermal energy + radiant energy
Which term refers to the Conservation of Energy?
The First Law of Thermal Dynamics
A Chain Reaction
E = mc^2
Thermal Expansion
In which of the following examples is work not being done?
A child pushes a lawn mower across a lawn
The space probe voyageur makes its way into deep space
A firefighter climbs a ladder
You're lifting a pile of books
Which type of energy is typically a by-product or waste energy of many energy transformations?
Thermal energy
Radiant energy
Elastic energy
Chemical energy
The efficiency of the energy transformation of a roller coaster increases when...?
The amount of kinetic energy increases
The amount of thermal energy increases
The amount of kinetic energy decreases
The amount of thermal energy decreases
Which of the following energies would be considered a potential or stored energy
Sound
Elastic
Thermal
Electric
When work done to an isolated system is negative ....
The system losses energy
The system gains energy
There is an energy transfer within the system
There is an energy transfer outside the system
The vacuum within a thermos is to reduce heat lost by
Conduction
Convection
Radiation
All three
What is the equivalent of 290° Kelvin in Celsius?
-17
38
17
563
Which term describes the amount of thermal energy required to change a liquid into a gas or a gas into a liquid
Specific latent heat of fusion
Latent heat of fusion
Latent heat of vaporization
Specifc latent heat
Which of the following would best absorb the sun's radiation
The white polar ice caps
The deep blue ocean
The rich black earth's soil
A red shirt
Which term describes the type of heat transfer as one touches a metal spoon sitting in a hot saucepan?
Conduction
Convection
Latent heat
Radiation
A scientist is trying to determine the specifc heat of 25g of an unknown substance. He heats up the substance to a temperature of 98°C and places it in 0.10kg of water at 14°C. He notices that the final temperature of the water and the substance is 18°C. What is the specific heat of the substance?
480J/kg°C
840J/kg°C
52.5J/kg°C
1250J/kg°C
If a jar taken form the fridge is hard to open, running the lid under warm water can help. Why is this?
The warm water acts as a lubricant for the jar
Warm water is able to shrink the jar slightly, so as to loosen the lid
Most lids from jars have chemicals that react to warm water
When the lid from the jar is warm, it expands and becomes looser
As the temperature of a substance increases...
The particles increase their motion
The particles increase the space between each other
The particles increase their kinetic energy
All of the above
The fact that it is warmer above the fire than beside it is due to
Conduction
Convection
Radiation
Latent Heat
Which of the following should be used to reduce heat lost from radiation for an individual in distress?
Wrap them in an insulated blanket
Use a mummy bag sealed tight around the person
Wrap them with a shiny reflective cover
A dark coated material blanket
In which of the following situations is here no work being done
Dragging a desk across the floor
A rocket flying owards the moon
Someone doing a chin-up
An apple falling out of a tree
Mechanical energy includes which of the following two forms of energy
Chemical and radiant
Thermal and nuclear
Potential and kinetic
Electricity and elastic
Which of the following energy types is not considered to be kinetic
Radiant
Electricity
Nuclear
Thermal
Which type of energy is typically a by-product or waste energy of an energy transformation
Radiant
Thermal
Chemical
Sound
As the temperature of a substance increases
The kinetic energy of particles increases
The potential energy of the particles increases
The kinetic energy of the particles decreasse
The potential energy of the particles decreases
The fact that it is warmer above the stove than beside it is due to ...
Conduction
Radiation
Convection
Latent heat
The specific heat capacity of aluminum is higher than copper means
It takes longer to heat up aluminum compared to the same size of copper
Aluminum can transfer more heat to water compared to the same size of copper
Given equal amounts of energy, aluminum would have a lower change in temperature
All of the above
Latent heat refers to the
The temperature change that occurs during a change in state
The thermal energy added as the object's temperature rises
The combined kinetic and potential energy of a substance
The thermal energy absorbed or released during a change of state
Pipe freeze and burst during winter months because of...
The contraction of metal pipes during colder temperatures
The exapansion of water near freezing temperatures
The expansion of the bolts that hold the pipes together
The salt for roads that makes it way into the pipes
Which of the following should be used to reduce heat lost from radiation for an indivdual in distress?
Wrap them in an insulated blanket
Use a mummy bag sealed tight around the person
Wrap them with a shiny reflective cover
A dark coated material
When an object has a temperature of 100°C its the same as
-273°K
-173°K
273°K
373°K
The amount of heat transferred depends on which of the following
The temperature of the substance
The number of molecules of the substance being added
The type of substance being added
All of the above
The amount of work done can be found using
The area of a F-d graph
The area of a f-t graph
The slope of a f-d graph
The slope of a f-t graph
A microphone preforms which of the following energy transformation
Sound -> kinetic -> electrical
Elastic -> radiant -> chemical
Electrical -> kinetic -> sound
Sound -> thermal -> electrical
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