The charge carried by one electron is e = -1.6 × 10-19 C. The number of electrons necessary to produce a charge of -1.0 C is
A) 6.3 × 1018.
B) 6.3 × 109.
C) 1.6 × 1019.
D) 1.6 × 109.
E) none of the above
A
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To be dimensionally consistent, distance [L], velocity [L/T], and acceleration
must be related as follows.
A. 
B. distance = velocity/acceleration
C. 
D. 
During the Kelvin-Helmholtz contraction phase, a protostar has a much ________ brightness as compared to the Sun
Fill in the blank(s) with correct word
The combining of two nuclei to form a larger nucleus with the release of energy is
a. nuclear fission b. nuclear fusion c. neutron activation d. nuclear emission e. beta decay
Derive an expression for the temperature distribution in an infinitely long rod of uniform cross section within which there is uniform heat generation at the rate of 1 W/m. Assume that the rod is attached to a surface at Ts and is exposed through a convective heat transfer coefficient h to a fluid at Tf.
GIVEN
• An infinitely long rod with internal heat generation
• Temperature at one end = Ts
• Heat generation rate ( q
GA) = 1 W/m
• Convective heat transfer coefficient = hc
• Ambient fluid temperature = Tf
FIND
• Expression for the temperature distribution
ASSUMPTIONS
• The rod is in steady state
• The thermal conductivity (k) is constant
SKETCH
