What is the equivalent resistance for these 3.00-? resistors?
a.
1.33 ?
b.
2.25 ?
c.
3.00 ?
d.
7.50 ?
b
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What will be an ideal response?
A string, 0.28 m long and vibrating in its third harmonic, excites an open pipe that is 0.82 m long into its second overtone resonance. The speed of sound in air is 345 m/s. The speed of transverse waves on the string is closest to
A) 120 m/s. B) 110 m/s. C) 100 m/s. D) 98 m/s. E) 91 m/s.
The hole for a bolt in a brass plate has a diameter of 1.200 cm at 20°C. What is the diameter of the hole when the plate is heated to 220°C? The coefficient of linear thermal expansion for brass is 19 × 10-6/°C
(Express your answer to 4 significant figures.) A) 1.205 cm B) 1.125 cm C) 1.195 cm D) 1.200 cm E) 1.210 cm
The ultimate fate of our Sun is to
A) explode in a supernova. B) become a white dwarf that will slowly cool with time. C) become a rapidly spinning neutron star. D) become a black hole.