Infrared radiation emitted by Earth’s surface
a. heats the troposphere from below.
b. causes convection.
c. causes weather (storms).
d. all of the above.
e. none of the above.
Ans: d. all of the above.
You might also like to view...
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. E. B. F. C. G. D. H. E. A.
State the law of conservation of angular momentum for a rotating object
What will be an ideal response?
Consider the problem described in Example 8.5. Show that the transient heating of the water in the pan, assuming the water to be well-mixed and thermally homogenous at any instant in time, can be expressed by the following:
where V is the volume of water in the pan and A is the area of the bottom surface of the
pan. Solve this equation (numerically or otherwise) to determine the time required to
heat the water to (a) 50°C and (b) 80°C. Also, determine the total heat transfer to the
water in the pan in each case.
GIVEN
? A covered pan kept in stove-top burner
? Depth of pan (L)= 8 cm
? Pan bottom surface temperature (Ts) = 100°C
? Initial water temperature at top (T?) = 20°C
? Diameter of the pan (D) = 15 cm
FIND
? Show the expression for heat flow through convection to pan
? Time required and total heat transfer to water while heating the water to 500C and 800C
ASSUMPTIONS
? Radiation heat transfer is negligible
SKETCH
Refer to Example 8.5
PROPERTIES AND CONSTANTS
From Appendix 2, Table 28, for dry air at the mean temperature of 60°C
Calculate an estimate of the range of a hypothetical force with the proton as the virtual exchange particle. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, mproton = 1.67 × 10-27 kg)
A) 6.7 × 10-25 m B) 2.1 × 10-16 m C) 6.0 × 10-8 m D) 1.5 × 10-15 m