How does the frequency of a tunning fork change, when the temperature is increased?

Does the frequency of a vibrating tuning fork change on increasing the temperature?

How does the frequency of a vibrating wire change when the attached load is immersed in water.

How does the density of a solid change with minor changes in temperature?

How does velocity of sound in air change when temperature rises by 1^(@)C ?

How does surface tension change with temperature ?

A tuning fork vibrates at a frequency of 256 Hz . (a) When the air temperature increases, the wavelength of the sound from the tuning fork : (i) increase, (ii) remains the same, (iii) decrease. Why ? (b) If the temperature rises from 0^@ to 20^@ C , what is the change in wavelength ?