A 100 N picture hangs from a nail in the wall. The diameter of the nail is 3.00 mm. The shear stress on the nail is
a. 
b. 
c. 
d. 
e. 
d.
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Which process does not transfer heat energy between objects?
A. Radiation B. Convection C. Conduction D. Reflection
Which of the following statements about electromagnetic waves in free space are true?
A. The higher-frequency travel faster than the lower-frequency waves. B. The higher-frequency waves have shorter wavelengths than the lower-frequency waves. C. The wavelengths of the visible waves are some of the longest electromagnetic waves. D. The wavelengths of the visible waves are some of the shortest electromagnetic waves. E. The electric field vector is always at right angles to the magnetic field vector.
A 4.7 cm radius spherical conducting shell has a uniform surface charge density. What is the density if the electric field 1.5 m from its center is 17 N/C outward?
a. 
b. 
c. 
d. 
e. 
A water bug on the surface of a pond bobs up and down three times per second on ripples with wavelength 10.5 cm. A fish resting at the surface of the pond is 8.50 m from the water bug. How long does it take a ripple passing the water bug to reach the fish?
a. 27.0 s b. 243 s c. 81.0 s d. 0.893 s