1. If the speed of sound is 350 m/s and the wavelength is 10 cm, what is the frequency?
2. Two otherwise identical wires are made of different materials, the second having twice the resistivity of the first. The first wire has a resistance of 2 Ohms, what is the resistance of the second wire?
3. A stretched cord of length 0.90 m and mass of 2.0 g has a fundamental frequency of 144 Hz. What is the tension in the cord?
4. If the effective spring constant of a 2000 kg older car (with poor shocks) is 6.0 x 10^4 N/m, what is the period of its vibration after hitting a bump?
5. What is the frequency of the second harmonic of a 2.00 m long stretched wire if the wave speed is 171.5 m/s?
6. In the figure below (in the attachment), a light ray traveling from air enters an unknown substance. What is the index of refraction for the unknown substance?
7. A parallel plate capacitor has circular plates with radius of 10 cm separated by 1.0 mm. If the capacitor is connected to a 12 V battery, what will the charge on the capacitor?
8. If the power dissipated in the circuit below (in the attachment) is 4.0 W, what is the voltage of the battery?
9. An object is placed 2.0 cm in front of diverging lens, which has a power of -25 diopters. Where is the image located at?