Answer:
By polishing the surface, as polishing makes the surface smooth and friction can be reduced
Explanation:
It could an acid that dissociates (dissolves) 10%
Virtual, upright, and larger than the object. :)
There are already 2 givens, hence we can do direct substitution to get the answer. To make the process simpler, derive the distance formula from the Work formula.
Work = Force x Distance
Distance =

Work is 450J while the force is 150N hot tub
To get the proper units, get the equivalent of Joule to eliminate newton. A joule Is equal to 1 N-m
Distance =

Distance = 3m
Hence, the hot tub is lifted 3 meters.
The magnitude of the electrostatic force between the two charges is 
Explanation:
The magnitude of the electrostatic force between two charges is given by Coulomb's law:

where:
is the Coulomb's constant
are the two charges
r is the separation between the two charges
In this problem, we have:


r = 20.0 cm = 0.20 m
Therefore, the force between the charges is

where the negative sign means that the force is attractive, since the two charges have opposite sign.
Learn more about electrostatic force here:
brainly.com/question/8960054
brainly.com/question/4273177
#LearnwithBrainly