The method of joining metals or ceramics where the parts are not melted but there is diffusion of the filler material into the parts to be joined is called ___________.
Fill in the blank(s) with the appropriate word(s).
brazing
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Hypothetically, if Planck's constant were smaller, atoms would be
A) larger. B) smaller. C) no different in physical size.
A tuning fork has a frequency of 300 Hz and hence a period of 3.33 × 10^?3 s. If the tuning fork is in an inertial frame of reference moving by the observer at speed of 0.620 c, what is the frequency of the fork as measured by the observer? (Assume that measurements are strictly by optical means and that the speed of sound waves in air is not pertinent here)
a. 235 Hz b. 382 Hz c. 185 Hz d. 185 Hz e. 487 Hz
When bringing water to a boil in the mountains, the time needed to reach the boiling point is
A) less than at sea level. B) more than at sea level. C) the same as at sea level.
A model rocket of mass, m, is fired upward from a launch pad with some initial speed, v. A gravitational force is exerted on the rocket
1.at all points in its motion except at it highest point. 2.at all points in its motion. 3.at no points in its motion. 4.at none of these choices.