Considering only the effect of diffraction, what is the smallest structure resolvable using a 12keV electron microscope?
a. 
b. 
c. 
d. 
c.
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A brass rod with a length of 20.0 cm is placed side by side with an aluminum rod with a length of 20.0 cm and this system is placed between a hot temperature of 150
and a cold temperature of -10.0
The coefficient of thermal conductivities of the brass and the aluminum are 100 W/m 
and 230 W/m C respectively. The rods have the same cross sectional area of 20.0 cm2. What is the heat flow from the hot temperature to the cold temperature?
A. 683 W B. 528 W C. 52.8 W D. 68.3 W
Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 270 million Americans, estimate how many tons of Aluminum needs to be recycled each year if each can weighs 1/16 pound and one ton = 2000 pounds.
A. 750,000 tons B. 1.5 million tons C. 1.75 million tons D. 3 million tons E. 1,600,000 tons
List 7 Physical properties of minerals that are most useful in identifying minerals.
What will be an ideal response.
The result of a particle meeting its antiparticle will most likely be
A. the creation of a "black hole." B. the release of quarks contained in each particle. C. the creation of a new particle with twice the mass of the original particles. D. annihilation of the two particles and the release of photons.