Q.A guitar string is 96 cm long and has a mass of 2.8 g. From the bridge to the support post (L) is 70 cm, and the string is under a tension of 490 N. What is the frequency of the first overtone?
Q. A 13 turn circular loop of wire has a diameter of 0.66 m. The plane of the circular loop makes an angle of 63 to the Earth's magnetic field. In 0.157 s the coil is flipped at a location where the magnitude of the Earth's magnetic field is 34 μT.