Both the microscope and the telescope make the object appear much larger. Why are these two instruments designed differently (e.g., why are the equations for magnification quite different)?
What will be an ideal response?
The object for a telescope is at infinity whereas the object of a microscope is very close to the objective. The ray diagrams and the designs are thus quite different.
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Evaluate the dimensionless groups hcD/k, U? Dp/?, cp ?/k for water, n-Butyl alcohol, mercury, hydrogen, air, and saturated steam at a temperature of 100°C. Let D = 1 m, U? = 1 m/sec, and hc = 1 W/(m2 K).
GIVEN
D = 1 m
U? = 1 m/s
hc = 1 W/(m2 K)
FIND
The dimensionless groups
? hc D/k (Nusselt number)
? U? D p/? (Reynolds number)
? cp ?/k (Prandtl number)
PROPERTIES AND CONSTANTS
From Appendix 2, at 100°C
The time is 9 pm and the Moon is setting in the west. The Moon phase is third quarter
a. True b. False Indicate whether the statement is true or false
EMF's from electrical lines ________
a. drop off with the distance squared from the line b. are only an influence for high voltages c. have been positively shown to cause cancer in children d. are not important inside houses.
What information is needed in order to forecast today's weather?
What will be an ideal response?