Find the frequencies of the first three harmonics of a 1.0-m long string which has a mass per unit length of 2.0 × 10?3 kg/m and a tension of 80 N when both ends are fixed in place.
What will be an ideal response?
100 Hz, 200 Hz, 300 Hz
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Neptune's blue color comes from water vapor in its upper atmosphere.
Answer the following statement true (T) or false (F)
When we measure the mass of a planet using the Doppler shift method, we know that it is mass
A) could well be smaller B) could be larger or smaller C) is exactly as measured D) could well be larger
A 0.40-kg mass attached to the end of a string swings in a vertical circle having a radius of 1.8 m. At an instant when the string makes an angle of 40 degrees below the horizontal, the speed of the mass is 5.0 m/s. What is the magnitude of the tension in the string at this instant?
a. 9.5 N b. 3.0 N c. 8.1 N d. 5.6 N e. 4.7 N
The bright object in this photo is a quasar (named 3C 273). According to current understanding, about how big is the source of the bright light?
A) about the size of our solar system B) about a million light-years across C) about the size of the central bulge of the Milky Way Galaxy (that is, about 10,000 light-years across) D) about 500 light-years across