What is the wavelength of an electromagnetic wave that has a frequency of 3 kilohertz?
A) less than 1 km
B) 1 km
C) more than 1 km
Answer: C
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When a gas in a container expands to twice its volume, its density
A) halves. B) doubles. C) quadruples. D) remains the same.
As you walk at 1.5 m/s toward a mirrored wall in a department store, how fast are approaching your image?
A. 1.5 m/s B. 3.0 m/s C. 6.0 m/s D. 0.75 m/s E. 0.0 the image stays at a constant distance
Imagine that you are trying to stop neutrinos with a lead shield. How thick would you need to make this shield to ensure that it can stop a neutrino?
A) about 700,000 kilometers (the radius of the Sun) B) about 150 million kilometers (the size of an astronomical unit) C) about 14 billion light years (the size of the observable universe) D) about one light year E) about one meter
If less horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object
A) accelerates in the direction of the applied force. B) experiences decreased friction. C) eventually slides to a stop. D) none of the above