In a BCC metal, the ______________ family of directions is the most closely packed.
Fill in the blank(s) with the appropriate word(s).
<111>
You might also like to view...
In the equation A = B/C, the B and C are said to be _______________ proportional
a. directly b. inversely c. not d. exactly
Hector drives a pickup truck horizontally at 15.0 m/s. He is transporting a crate of delicate lead crystal. If the coefficient of static friction between the crate and the truck bed is 0.300, what is the minimum stopping distance for the truck so the crate will not slide?
a. 28.7 m c. 38.3 m b. 51.0 m d. 44.4 m
Only 10% of the energy dissipated by the tungsten filament of an incandescent lamp is in the form of useful visible light. Consider a 100 W lamp with a 10 cm spherical glass bulb. Assuming an emissivity of 0.85 for the glass and ambient air temperature of 20°C, what is the temperature of the glass bulb?
GIVEN
• A spherical glass light bulb in air
• Bulb power consumption (P) = 100 W
• 10% of energy is in the form of visible light
• Diameter (D) = 10 cm = 0.1 m
• Bulb emissivity (?) = 0.85
• Ambient temperature (T?) = 20°C = 293 K
FIND
• The temperature of the glass bulb (Ts)
ASSUMPTIONS
• Ambient air is till
• The bulb has reached steady state
• The surrounding behave as a black body at T?
SKETCH
PROPERTIES AND CONSTANTS
Boltzmann constant (?) = 5.7 × 10–8 W/(m2 K4).
Thin Lenses: A convex lens has focal length f. If an object is placed at a distance of 2f from the lens on the principal axis, the image is located at a distance from the lens
A. of 2f. B. between f and 2f. C. of f. D. between the lens and f. E. of infinity.