3. State four ways in which surface tension is useful to
man:

We can find numerous examples where surface tension plays a role. ... High surface tension of water is also the reason why rain comes down as a spherical drop. High surface energy drives the water drop to take a shape with as little surface area as possible, making a sphere shape most favorable.

P = 6*5 = 30 [kg*m/s]

Explanation:

in order to solve this problem, we must remember that linear momentum is defined as the product of mass by Velocity. This way you can calculate the momentum using the following equation.

P = m*v

where:

P = lineal momentum [kg*m/s]

m = mass = 6 [kg]

v = velocity = 5 [m/s]

P = m*v

P = 6*5 = 30 [kg*m/s]