A cordless phone operates at 900 MHz. What is the wavelength of the electromagnetic wave used by this phone? (c = 3.0 × 108 m/s)
What will be an ideal response?
0.33 m
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A quantum number for a quark is
a. strangeness b. beauty c. charm d. truth e. all of the above
Converging mirrors
A. Will reflect parallel light rays to the focal point of the mirror. B. Will cause parallel light rays to spread out. C. Will reflect parallel light rays back along their original path D. Will scatter parallel light rays in random directions.
A cube of aluminum is at a depth of 1.000 km under seawater whose density is 
The bulk stress on the cube due to the seawater is
A. 
B. 
C. 
D. 
E. 
You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A mild 2-m/s breeze is blowing. If the mosquito joins you for lunch it should hover over you by flying
A) against the breeze at 2 m/s. B) with the breeze at 2 m/s. C) a bit faster than wind speed. D) none of the above