Which one of the arrows below most closely indicates the direction of the bob’s acceleration when it is at point 1?
A. A
B. B
C. C
D. D
E. E
F. F
D. D
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How many constitutional isomers that are dibromopropanes exist?
a. 5 b. 4 c. 7 d. 3 e. 6
A 2.0-kg block slides down a fixed, rough curved track. The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 1.8 m. Assume the block starts from rest. What is the change in mechanical energy of the block caused by the force of friction during this descent?
a. -14 J b. -12 J c. -10 J d. -16 J e. -25 J
What is the slit spacing of a diffraction necessary for a 600 nm light to have a first order principal maximum at 25.0°?
A) 1.42 ?m B) 2.01 ?m C) 3.12 ?m D) 4.12 ?m E) 5.44 ?m
In a good conductor, the highest energy band containing electrons is
A) only partially filled. B) completely filled.