Sound wave travels through the air at 320 M/S and has a frequency of 150 HZ what is the wavelength of this wave

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?