In brittle ceramics, the fracture strength is lower than the _________strength.
Fill in the blank(s) with the appropriate word(s).
yield
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A current of 2.0 A in the 100-turn primary of an ideal transformer causes 14 A to flow in the secondary. How many turns are in the secondary?
A) 700 B) 4 C) 114 D) 14
Red-colored diode lasers for pointers and surveying are made from pnjunctions of the compound semiconductor GaAs that has an energy gap of 1.42 eV. What is the wavelength of the light from a GaAs laser?
What will be an ideal response?
Which one of the following is TRUE?
A) Most elliptical galaxies contain only young stars. B) Barred spiral galaxies have similar properties to normal spirals, except for the "bar" feature. C) Galaxy collisions destroy most of the stars in the galaxies involved. D) Irregular galaxies rarely have star formation taking place in them. E) Most galaxies appear to be approaching the Milky Way Galaxy.
The energy released when an atom takes an electron is called
a. internal energy b. dissociation energy c. binding energy d. electron affinity e. ionization energy