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251: The pressure placed on a square with 1/2 meter sides is 1000 Pascal’s. How much force is being applied to the square?
ANSWER: 250 NEWTONS
252: What is the ratio of a substance's density to the density of water called?
ANSWER: SPECIFIC GRAVITY (also accept relative density)
253: Which of the following is NOT closely associated with a non-magnetic Phase Diagram?
w) Eutectic Temperature (pron: you-tek-tik)
x) Curie Point
y) Solidus
z) Liquids Curves
ANSWER: X -- CURIE POINT
254: A bimetallic strip commonly found in home furnace thermostats works because of the difference in this property of the two metals. Is it:
w) Thermal shock
x) Thermal conductivity
y) Thermal expansion
z) Thermal diffusivity
ANSWER: Y -- THERMAL EXPANSION
255: Which of the following physical properties is TRUE of most dense ceramic materials?
w) High tensile strength
x) Good ductility
y) High compressive strength
z) High electrical conductivity
ANSWER: Y -- HIGH COMPRESSIVE STRENGTH
256: The Modulus of Elasticity for a material refers to:
w) The ability of a material to resist corrosion
x) The ratio of stress over strain
y) The maximum load over the cross sectional area
z) None of the above
ANSWER: X -- THE RATIO OF STRESS OVER STRAIN
257: The rest mass of an electron is closest to:
w) 10-15 kilograms
x) 10-17 kilograms
y) 10-30 kilograms
z) 10-50 kilograms
ANSWER: Y -- 10-30 KILOGRAMS (accept 9.11 x 10-31kg)
258: Carbon-14 dating is based on the decay of 14C to 14N. What type of radioactive decay is associated with this nuclear reaction?
ANSWER: b-RAY or b DECAY or ELECTRON EMISSION
259: Normal sunlight is non-polarized. Why are polarized sunglasses worn?
ANSWER: REFLECTED LIGHT FROM SMOOTH SURFACES IS POLARIZED
260: Many common household fluids, such as margarine, undergo a decrease in viscosity when subjected to a shearing force. What is this property called?
ANSWER: THIXOTROPIC (pron: thik-sa-trop-ick)
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