The primary reason for adding fiber reinforcement to a ceramic matrix is to increase the resistance to _________.
Fill in the blank(s) with the appropriate word(s).
fracture
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If the orbital velocity of the Moon is 1.0 km/s, what is the orbital velocity of a satellite that is 1/16th as far from Earth as the Moon? Hints: There is a long way and a short way to do this calculation. ; G = 6.67 10^-11 m3/s2/kg
a. 1/16 km/s b. 1/8 km/s c. 4 km/s d. 8 km/s e. 16 km/s
A ball is thrown straight up with a speed of 36 m/s. How long does it take to return to its starting point, assuming no air?
A) 3.7 s B) 7.3 s C) 11 s D) 15 s
At a certain instant, a proton is moving in the positive x direction through a magnetic field in the negative z direction. What is the direction of the magnetic force exerted on the proton?
1.positive z direction 2.negative z direction 3.positive y direction 4.negative y direction 5.The force is zero.
What is a quasar?
A) a starlike object that actually represents a bright patch of gas in the Milky Way B) a very large galaxy thought to be formed by the merger of several smaller galaxies, resulting in a quick burst of star formation C) the name given to the largest objects in the Kuiper Belt D) the extremely bright center of a distant galaxy E) another name for very bright stars of spectral type O