What is the chance of three heads and two tails being the result of the toss of five coins?
1.1/32
2.5/32
3.5/16
4.1/2
1
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One reason that dislocation motion is difficult in covalently bonded materials such as diamond is that:
(a) The interatomic distance is large. (b) Covalent bonds resist changes in angle. (c) The curvature of the interatomic potential is low. (d) The interatomic potential is shallow.
About how long does it take a spacecraft to go from Earth to Jupiter?
a. a week b. a month c. a year d. several years e. several decades
Three +3.0-?C point charges are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0-?C charge. Find the magnitude of the electric field at the center of the square. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
What will be an ideal response?
Which of the following compounds contains both ionic and covalent bonds?
a. CaSO4 b. CHCl3 c. HNO3 d. C12H22O11