A stretched string is observed to vibrate in three equal segments when driven by a 480-Hz oscillator. What is the fundamental frequency of vibration for this string?
A. 480 Hz
B. 320 Hz
C. 160 Hz
D. 640 Hz
E. 240 Hz
Answer: C
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As more lamps are connected in a series circuit, the overall current in the power source
A) increases. B) decreases. C) stays the same.
Impulse: A block of mass m = 34 kg and speed V is behind a block of mass M = 81 kg and speed of 0.50 m/s, as shown in the figure. The surface is frictionless and the blocks collide and couple. After the collision, the blocks have a common speed of 0.90 m/s. What is the magnitude of the impulse on the 34-kg block due to the collision?
A. 32 N ? s B. 14 N ? s C. 41 N ? s D. 57 N ? s E. 73 N ? s
Name the layers of the Earth's atmosphere, going up from the surface
What will be an ideal response?
A lens that is thinner at the center than the edges
a. is a converging lens. b. is a diverging lens. c. always forms a real image. d. always forms a virtual image. e. none of the above