Mass per cubic metre so kg/m3. Temperature may give different results.
Answer:
Explanation:
Given
Volume of paint is 
Area of cover 
Suppose paint to be a rectangular box with thickness t and volume V
therefore we can write as




Wave speed = frequency * wavelength
Wave speed = 4 * 25
Wave speed = 100 m/s
For an object to be in equilibrium, it must be experiencing no acceleration. This means that both the net force and the net torque on the object must be zero.