In a common dc circuit, electrons typically move at the speed of
A) a fraction of a centimeter per second.
B) a few meters per second.
C) sound.
D) light.
E) none of the above
Answer: A
You might also like to view...
Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
a. 40 hrs b. 25 hrs c. 50 hrs d. 65 hrs e. 50000 hrs
Current: How much charge must pass by a point in a wire in 10 s for the current in the wire to be 0.50 A?
A. 20 C B. 2.0 C C. 5.0 C D. 0.050 C
100 grams of molten lead (600°C) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21°C), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g×°C; the latent heat of fusion and the melting point of lead are 2.45 × 10^4 J/kg and 327°C.)
a. -145 b. -252 c. -302 d. -429 e. -100
The drive chain in a bicycle is exerting a torque of 0.850 N ? m to the wheel of the bicycle. You can treat the wheel as a thin uniform hoop (or ring) with a mass of 0.750 kg and a radius of 33.0 cm. What is the angular acceleration of the wheel?
A) 10.4 rad/s2 B) 20.8 rad/s2 C) 5.20 rad/s2 D) 3.43 rad/s2 E) 1.06 rad/s2