The circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second then its linear speed is
A) 1 m/s.
B) 2 m/s.
C) 3 m/s.
D) 3.14 m/s.
E) 6.28 m/s.
Answer: B
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A 1.20-kg ball is hanging from the end of a rope. The rope hangs at an angle 25.0° from the vertical when a 15.0 m/s horizontal wind is blowing. If the wind's force on the rope is negligible, what drag force does the wind exert on the ball?
A) 32.3 N B) 24.1 N C) 3.68 N D) 5.48 N E) 11.8 N
Ideal Gas Law: Two containers of equal volume each hold samples of the same ideal gas. Container A has twice as many molecules as container B. If the gas pressure is the same in the two containers, the correct statement regarding the absolute temperatures TA and TB in containers A and B, respectively, is
A. TA = TB.
B. TA = 2TB.
C. TA = 
TB.
D. TA = 
TB.
E. TA = 
TB.
The helium flash converts helium nuclei into
A) iron. B) beryllium. C) carbon. D) oxygen. E) boron.
A sound wave in air travels at a speed of 340 m/s. If the wavelength is 0.100 m, in what range of the sound spectrum is the wave?