Five objects of mass m move at velocity 
at a distance r from an axis of rotation perpendicular to the page through point A, as shown below. The one that has zero angular momentum about that axis is
A.
B.
C.
D.
E.
Answer: D
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A 5.0-kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is decreasing at a constant rate of 2.0 m/s in each second. What is the tension in the string supporting the mass?
a. 49 N b. 39 N c. 59 N d. 10 N e. 42 N
Plot the Bessel’s Function of the second kind of zero and first order, Y0 and Y1 for arguments from 0 to 10.
What will be an ideal response?
Matter Waves: Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their de Broglie wavelength will
A. increase by a factor of 4.
B. increase by a factor of 2.
C. decrease by a factor of 2.
D. increase by a factor of 
.
E. decrease by a factor of 
.
Radio telescopes image a universe much ________ in temperature than with visible light
Fill in the blank(s) with correct word