A 1.6-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 190 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest
The block then executes simple harmonic motion along the horizontal x-axis. What is the velocity of the block at time t = 0.40 s? A) 0.82 m/s
B) -0.82 m/s
C) 0.30 m/s
D) -0.30 m/s
E) 0.00 m/s
A
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Why are novae much more common than supernovae?
A. It takes a special type of white dwarf to go supernova, but any old white dwarf can go nova. B. Novae are actually brighter than supernovae and so are easier to find. C. A white dwarf's mass slowly decreases with each nova but the whole white dwarf is completely obliterated during a supernova D. Both B and C E. None of the above
An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 48 mm and 84 mm
The electric potential of the inner conductor with respect to the outer conductor is -400 V. (k = 1/4??0 = 8.99 × 109 N • m2/C2 ) The energy stored in a 1.0-m length of this capacitor is closest to A) 8.0 ?J. B) 5.7 ?J. C) 11 ?J. D) 16 ?J. E) 22 ?J.
4-Fluoroheptane and 3-fluoroheptane are
a. isomers. b. the same compound. c. neither isomers nor the same compound.
A body on the surface of the earth weighs 400 lb. The radius of the earth is about 4,000 miles. If this same body were placed on a 4,000 mile high tower, its weight would be 200 lb
Indicate whether the statement is true or false