Which of the following properties is used to distinguish between the core, mantle, and crust of a planet?
A) geological activity
B) temperature
C) rock strength
D) density
E) color
D) density
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Did Tycho's data prove that Kepler' theory was true?
A) No, because some of Tycho's observations were incorrect. B) No, because observations can never completely prove the truth of scientific theory. C) No, because Tycho's data disagreed with Kepler's theory. D) Yes, because Kepler's theory agreed with all of Tycho's data. E) Yes, because Tycho's data ruled out the competing theories of Ptolemy and Copernicus.
The ________ equation was written to assess the probabilities of technological, intelligent life existing in the Galaxy
Fill in the blank(s) with correct word
Consider the following two statements and then select the option below that is correct
i. It is possible for an object to move in the absence of forces acting on the object. ii. It is possible to have forces acting on an object in the absence of motion of the object.
1.The second statement is the only correct one. 2.Both statements are correct. 3.Neither statement is correct. 4.The first statement is the only correct one.The experimental data shown tabulated were obtained by passing n-butyl alcohol at a bulk temperature of 15°C over a heated flat plate (0.3-m-long, 0.9-m-wide, surface temperature of 60°C). Correlate the experimental data using appropriate dimensionless numbers and compare the line which best fits the data with Equation 5.38.
GIVEN
n-butyl alcohol flowing over a heated flat plate
Bulk temperature (Tb) = 15°C
Plate surface temperature (Tp) = 60°C
Plate length (L) = 0.3 m
Plate width (w) = 0.9 m
The experimental data given above
FIND
(a) Correlate the data by appropriate dimensionless numbers
(b) Compare line which best fits the data with Equation 5.38
ASSUMPTIONS
Steady state
Alcohol flows parallel to the length of the plate
Plate temperature is uniform
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 19: For n-butyl alcohol at the average of the bulk and surface temperatures
(known as the film temperature): 37.5°C.
