A string is fixed at both ends. The mass of the string is 0.0040 kg and the length is 8.00 m. The string is under a tension of 500.00 N. The string is driven by a variable frequency source to produce standing waves on the string. Find the wavelengths (in m) and frequency (in Hz) of the first four modes of standing waves.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )