How is L determined if it is greater than 0.6 m?
What will be an ideal response?
L is the characteristic length used to determine a Grashof number and the fluid
flow. For horizontal surfaces L seems to take a value of 0.6 m or less. If L is
greater than this it is not used for horizontal free convection. On vertical
surfaces L is not limited at all and is typically the vertical height of free
convection.
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A. 1900 J/kg ? K B. 2270 J/kg ? K C. 3300 J/kg ? K D. 3800 J/kg ? K E. 4280 J/kg ? K
Compared to the volume of its nucleus, the volume of an atom is about
A) the same. B) a thousand times greater. C) a million times greater. D) a billion times greater. E) a trillion times greater.
When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°. What is the wavelength of the light?
A) 452 nm B) 336 nm C) 633 nm D) 752 nm E) 363 nm
The most widely accepted system of measurement is the metric system
a. True b. False Indicate whether the statement is true or false