An object is 10 cm in front of a concave spherical mirror with a focal length of magnitude 3.0 cm. Where is the image?
A) 13 cm from the mirror
B) 7.0 cm from the mirror
C) 4.3 cm from the mirror
D) 3.3 cm from the mirror
C
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Transverse waves are traveling on a 1.00-m-long piano string at 500 m/s. If the points of zero vibration occur at one-half wavelength (where the string is fastened at both ends), find the frequency of vibration
a. 250 Hz b. 500 Hz c. 1000 Hz d. 2000 Hz e. 2500 Hz
If a is acceleration, v is velocity, x is position, and t is time, then which equation is not dimensionally correct?
a. t = x/v b. a = v2/x c. v = a/t d. t2 = 2x/a
How does the rate of hydrogen consumption of a main-sequence B star compare to the hydrogen consumption of the sun?
A) A B star consumes hydrogen at a rate about 107 to 108 times faster than the sun. B) A B star consumes hydrogen at a rate about 103 to 104 times faster than the sun. C) A B star consumes hydrogen at a rate about 6 to 10 times faster than the sun. D) This cannot be answered using the HR diagram.
The binding energy per nucleon
A) decreases steadily as we go to heavier elements. B) increases steadily as we go to heavier elements. C) is approximately constant throughout the periodic table, except for very light nuclei. D) has a minimum near iron in the periodic table.