An atom in face centered cubic aluminum has ______________nearest neighbors.
Fill in the blank(s) with the appropriate word(s).
twelve
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Millikan's experiments on balancing charged oil droplets in an electric field first showed that:
a. electrons have a definite charge to mass ratio, which he measured. b. electric charges are integer multiples of a single fixed electron charge, which he measured. c. photons have energy E = hf for frequency f. d. electrons have negative charge. e. protons are positively charged.
The figure shows the equation of time; notice that the vertical axis shows "apparent solar time minus means solar time." Suppose the date is about Feb. 15 and you have a digital watch that is set to the local mean solar time. If the watch say sit is precisely noon, then
A) the Sun will reach your meridian in about 15 minutes. B) the Sun is now crossing your meridian. C) the Sun crossed your meridian about 15 minutes ago. D) the Sun is now at its highest point in your sky.
____________________ volcanoes have shallow slopes and are associated with hot spots. These types of volcanoes have been seen on the surface of Venus
Fill in the blank(s) with correct word
Can work be done on a system if there is no motion?
A) Yes, since motion is only relative. B) Yes, if the sum of the external forces is zero. C) Yes, if an external force is acting on the system. D) No, since a system which is not moving has no energy. E) No, since work involves a non-zero displacement.