Which kind of vaporization can occur at any temperature between the freezing and boiling points of a substance?
What will be an ideal response?
Ans: Evaporation
Vaporization that can occur at any temperature between the freezing and boiling points of a substance is evaporation.
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Hydrogen gas seems to have a diffusivity of about 2.6 x 10^-13 m^2/s when diffusing into iron at 770 K. What would you expect the rate of diffusion or mass flow rate per unit area of hydrogen to be when stored in an iron container at 5 atmospheres pressure, assuming the density of hydrogen at 1 mm in the iron from the containing surface to be 5% of the normal hydrogen density, given by p/RT?
What will be an ideal response?
A high-voltage transmission line carries 1 400 A at 600 000 V. What is the power carried by the line?
a. 840 MW b. 370 MW c. 140 MW d. 84 MW e. 233 MW
The distance between the object to be viewed and the eyepiece of a compound microscope is 18.0 cm. The focal length of its objective lens is 0.80 cm and the eyepiece has a focal length of 2.3 cm
The near-point distance of the person using the microscope is 25.0 cm. What is the magnitude of the total magnification of the microscope if it is designed for minimum eyestrain? A) 480 B) 120 C) 184 D) 200 E) 360
A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave moves, its wavelength:
1.increases. 2.decreases. 3.stays constant.