The north geographic pole of the Earth
A. Is a south magnetic pole
B. has always had the same polarity
C. is exactly at the magnetic pole
D. none of the above
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D. none of the above
,The resolution of a human eye is about
A. 4mm
B. 2cm
C. 1 micro
D. 1/60 degree
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D. 1/60 degree
Sound tends to bend toward the side with
A. colder air
B. warmer air
C. denser air
D. less dense air
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B. warmer air
The sound from a passing car sounds like a high pitch but as it passes, it gets lower.
That's an example of
A. the Huygens principle
B. wave cancellation
C. the Ewing principle
D. the Doppler shift
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, D. the Doppler shift
The organization that studies climate change is
A. IPCC
B. NAACP
C. AFL-CIO
D. IAEA
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A. IPCC
Ice in Antarctica is
A. melting, as expected from global warming predictions
B. increasing, as expected from global warming predictions
C. melting, contradicting global warming predictions
D. increasing, contradicting global warming predictions
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D. increasing, contradicting global warming predictions
Red-eye demonstrates that
A. light is a wave
B. air absorbs blue more than red
, C. camera film is sensitive to red
D. the eye is a retroreflector
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D. the eye is a retroreflector
To be affordable without subsidy or carbon credits, the cost of a billion-watt solar
plant must be not much more than
A. $100 million
B. $1 billion
C. $30 billion
D. $10 billion
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D. $10 billion
A Tesla coil is a kind of
A. transformer
B. dynamo
C. radio transmitter
D. sensor for the Curie point
Give this one a try later!
A. transformer
A. Is a south magnetic pole
B. has always had the same polarity
C. is exactly at the magnetic pole
D. none of the above
Give this one a try later!
D. none of the above
,The resolution of a human eye is about
A. 4mm
B. 2cm
C. 1 micro
D. 1/60 degree
Give this one a try later!
D. 1/60 degree
Sound tends to bend toward the side with
A. colder air
B. warmer air
C. denser air
D. less dense air
Give this one a try later!
B. warmer air
The sound from a passing car sounds like a high pitch but as it passes, it gets lower.
That's an example of
A. the Huygens principle
B. wave cancellation
C. the Ewing principle
D. the Doppler shift
Give this one a try later!
, D. the Doppler shift
The organization that studies climate change is
A. IPCC
B. NAACP
C. AFL-CIO
D. IAEA
Give this one a try later!
A. IPCC
Ice in Antarctica is
A. melting, as expected from global warming predictions
B. increasing, as expected from global warming predictions
C. melting, contradicting global warming predictions
D. increasing, contradicting global warming predictions
Give this one a try later!
D. increasing, contradicting global warming predictions
Red-eye demonstrates that
A. light is a wave
B. air absorbs blue more than red
, C. camera film is sensitive to red
D. the eye is a retroreflector
Give this one a try later!
D. the eye is a retroreflector
To be affordable without subsidy or carbon credits, the cost of a billion-watt solar
plant must be not much more than
A. $100 million
B. $1 billion
C. $30 billion
D. $10 billion
Give this one a try later!
D. $10 billion
A Tesla coil is a kind of
A. transformer
B. dynamo
C. radio transmitter
D. sensor for the Curie point
Give this one a try later!
A. transformer
