Electromagnetic Spectrum And Heat Transfer Question Preview (ID: 36724)
Electromagnetic Spectrum.
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An electric hotplate is used to cook food in an all metal frying pan. Which best shows the path of the conduction of thermal energy?
a) Pan to Coil
b) Coil to Pan to food
c) Food to Pan to Handle
d) Handle to Coil
Which of the following heat exchange processes involves the collision of particles?
a) Insulation
b) Conduction
c) Convection
d) Radiation
How is energy transferred when an instant cold pack is put on a muscle injury?
a) Heat energy is transferred by conduction from the muscle to the cold pack
b) Heat energy is transferred by convection from the cold pack to the muscle
c) Heat energy is transferred by radiation from the musle to the cold pack
d) Heat energy is transferred by absorption from cold pack to the muscle
A class made a solar cooker out of a large can. What color should they paint the can in order to collect the most heat?
a) Black
b) Green
c) Pink
d) White
Why can you see someone clearly through a clear glass window but not through a frosted glass window?
a) Clear glass reflects light, but frosted glass absorbs light
b) Clear glass transmits light, but frosted glass scatters light
c) Clear glass transmits some light, but frosted glass absorbs all light
d) Clear glass scatters some light, but frosted glass transmits all light
In 2001, NASA launched a probe to investigate very low-energy radiation emitted when the universe began. What part of the electromagnetic spectrum does this probe observe and record?
a) Infrared
b) Microwave
c) Ultraviolet
d) Visible
How does the color of an object affect the amount of energy it receives from sunlight?
a) Light colored objects reflect more light and become warmer than darker objects
b) Light colored objects absorb more light and become warmer than darker objects
c) Dark colored objects reflect more light and become warmer than lighter objects
d) Dark colored objects absorb more light and become warmer than lighter objects
What is the effect of absorption of infrared light by human skin?
a) Sunburn on the skin surface
b) Disinfection of the skin tissues
c) Feeling of warmth on the skin
d) Immediate death of skin cells
What process in the atmosphere protects people from the ultraviolet rays in sunlight
a) Ozone absorbs ultraviolet light
b) Nitrogen refelcts ultraviolet light
c) Water vapor scatters ultraviolet light
d) Carbon Dioxide blocks ultraviolet light
Which would be the best conductor of electricity? `
a) Air
b) Cork
c) Water
d) Silver
You use a spoon to stir hot soup. Which of the following spoon handles would get hot the quickest?
a) A metal spoon
b) A plastic spoon
c) A rubber spoon
d) A wooden spoon
What best explains why some cooking pans have rubber handles?
a) The rubber in the handles is easy to hold
b) The rubber in the handles is a good insulator
c) The rubber in the handles keeps the food in the pan hot
d) The rubber in the handles keeps the metal in the pan cool
When potholders are sued to remove hot pans from an oven, the potholders are serving as
a) Conductors
b) Insulators
c) Reflectors
d) Transmitters
Which physical property is important to have in a materiel used in cookware?
a) Poor conductor of heat
b) Good conductor of heat
c) Low flexibility
d) High flexibility
Which material is the best conductor of heat at room temperature?
a) Air
b) Water
c) Sulfur
d) Copper
Which statement explains why heat from the Sun can warm up water in a glass?
a) Light travels very fast
b) Light travels in straight lines
c) Water refelcts light energy
d) Water absorbs light energy
When you are riding a bicycle at night, your bicycles reflectors help people in cars see your bicycle. How do bicycle reflectors work?
a) They are made of a special material that gives off its own light
b) They are hooked up to batteries that allow them to produce light
c) They bounce light back from other sources
d) They are covered with paint that glows in the dark
A worker for an electrical company is preparing to fix a power line. Why would he put on rubber gloves before working with any power lines?
a) Rubber is a poor conductor of heat but a good conductor of electricity
b) Rubber is a good conductor of heat but a poor conductor of electricity
c) Rubber is a poor conductor of heat and electricity
d) Rubber is a good conductor of heat and electricity
Why are some coffee cups composed of ceramic materials?
a) Ceramic materials are insulators that aid heat transfer
b) Ceramic materials are conductors that aid heat transfer
c) Ceramic materials are insulators that limit heat ransfer
d) Ceramic materials are conductors that limit heat transfer
Which is considered a good insulator of heat?
a) Glass, because it allows heat to flow easily
b) Aluminum, because it allows heat to flow easily
c) Silver, because heat is unable to flow easily through it
d) Plastic, because heat is unable to flow easily through it
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