Sediments deposited in an even, horizontal manner illustrate the principle of
A) superposition.
B) original horizontality.
C) succession.
D) conformity.
Answer: B
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Potential: A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. What speed does the proton gain? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)
A. 2.2 × 105 m/s B. 3.1 × 105 m/s C. 9.6 × 105 m/s D. 1.1 × 105 m/s
A reasonable estimate for the height of the walls in an ordinary American home is
A) 10 m. B) 8 m. C) 2.5 m. D) 1.5 m.
The maximum magnetic energy density of a sinusoidal electromagnetic wave is 8.95 × 10-5 J/m3. What is the amplitude of the magnetic field component of this wave?
(c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2 ) A) 12.0 ?T B) 16.0 ?T C) 15.0 ?T D) 14.0 ?T E) 13.0 ?T
Determine the steady-state temperatures of two radiation shields placed in the evacuated space between two infinite planes at temperatures of 555 K and 278 K. The emissivity of all surfaces is 0.8.
GIVEN
-Two radiant shields placed in the evacuated space between two infinite planes
-Temperature of the planes
-T1 = 555 K
-T4 = 278 K
-Emissivity of all surface (?) = 0.8
FIND
-The steady state temperatures of the shields (T2, T3)
ASSUMPTIONS
• All surfaces are gray and diffuse
SKETCH
