Which of the following is not a fundamental component of the atom?
a. proton
b. neutron
c. ion
d. electron
c
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Estimate the heat transfer from an object at 100ºF to a surface at 40ºF through a heat conducting media having thermal conductivity of 5 Btu/hr?ft?ºF if the shape factor is 1.0 ft.
What will be an ideal response?
The greenhouse effect keeps Venus hot because
a. the atmosphere contains free oxygen. b. the atmosphere is predominantly carbon dioxide. c. the surface converts infrared into visible radiation. d. the surface is free of sulfur compounds. e. the magnetic field traps a large number of particles from the solar wind.
A constant force of 15 N in the negative y direction acts on a particle as it moves from the origin to the point (3i+3j-1k)m. How much work is done by the given force during this displacement?
What will be an ideal response?
Suppose that an atom has exactly two energy levels separated by an energy difference ?E. When such atoms are in contact with a reservoir at a temperature T1, the ratio of the number of atoms in the higher level to the number in the lower level is 
. If we increase the temperature to T2, the numerical value of this ratio
A. increases. B. decreases. C. remains the same.