Problems:1. On a keyboard, you strike middle C, whose frequency is 256 Hz. (a) What is the period of one vibration of this tone? (b) As the sound leaves the instrument at a speed of340 m/s, what is its wavelength in air?2. In a 25C room, hot coffee in a vacuum flask cools from 75C to 50C in eight hours. What will its temperature, in Fahrenheit and Kelvin, be after another eight hours?3. The specific heat capacity of gold is 0.031 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 45-g piece of gold from OC to 100C?