The best electrically conducting elements are located ________ in the periodic table.
A. in the last two columns
B. on the left side or in the transition regions
C. in the middle columns
D. in the first two rows
E. randomly
Answer: B
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A golf ball of mass 0.050 kg is at rest on the tee. Just after being struck, it has a velocity of 102 m/s. If the club and ball were in contact for what is the average force exerted on the ball by the club?
A) 6.3 kN B) 7.1 kN C) 5.5 kN D) 4.9 kN
The only possible geometry of an accelerating universe is open
Indicate whether the statement is true or false
Nearsightedness is usually corrected with
A) converging lenses. B) diverging lenses. C) convex mirrors. D) cylindrical lenses. E) concave mirrors.
Waves on a String: When a certain string is under tension T, the speed of a wave in the string is v. What will be the speed of a wave in the string if the tension is increased to 2T without changing the mass or length of the string?
A. v/2
B. v/
C. v
D. 2v
E. 4v