If you comb your hair and the comb becomes positively charged, then your hair becomes
A) positively charged.
B) negatively charged.
C) uncharged.
Answer: B
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The spring tides occur during the new and full lunar phases
a. True b. False Indicate whether the statement is true or false
Coulomb's Law: The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the electric force on the electron due to the nucleus? ( e = 1.60 × 10-19 C, k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 2.9 nN B. 1000 C C. 3.7 nN D. 6.8 nN E. 9.2 nN
An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadrant does this vector point?
a. 1st b. 2nd c. 3rd d. None, since the object is now moving in the y-direction.
Doubling only the mass of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
A) increases the energy by a factor of square root of two B) increases the energy by a factor of two C) increases the energy by a factor of three D) increases the energy by a factor of four E) produces no change