What advantage might an electron microscope have over a light microscope?
What will be an ideal response?
Electrons can be accelerated to a speed such that they have wavelength much less than light and can "see" smaller detail.
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How many nodes does a standing wave in a string have at the frequency of the sixth harmonic?
a. 12 b. 6 c. 3 d. The answer is not given.
Sunspots are only about 2,000 K cooler than the much brighter photosphere
Indicate whether the statement is true or false
Consider two copper wires. One has twice the length of the other. How do the resistivities of these two wires compare?
A) The longer wire has twice the resistivity of the shorter wire. B) Both wires have the same resistivity. C) The longer wire has four times the resistivity of the shorter wire. D) The shorter wire has twice the resistivity of the longer wire.
What are the formula masses of water, H20; propene, C3H6; and 2-propanol, C3H8O?
A) water: 18 amu; propene: 40 amu; 2-propanol: 58 amu B) water: 18 amu; propene: 42 amu; 2-propanol: 62 amu C) water: 18 amu; propene: 42 amu; 2-propanol: 60 amu D) water: 18 amu; propene: 44 amu; 2-propanol: 64 amu