Answer:
1) the color of a mirror is white but it depends on what angle of the light the mirror is facing.
2)rain drops have more density than density, (one gallon of water is 1,000 pounds, snow is little crystals of water than freeze in the atmosphere than the high current winds push them.
3)A rush hour or peak hour is a part of the day during which traffic congestion on roads and crowding on public transport is worst. Normally, this happens twice a day, while people are commuting. sometimes it's slow traffic but people tend to drive fast to reach there destination.
Step-by-step explanation:
case vhole=√(vputt2-2gh).
(f=μmgcosθ)
will be different than on level ground (f=μmg); here μ is the coefficient of friction (essentially, I believe, what is measured by the "stimp meter"), m is the mass of the ball, and g is the acceleration due to gravity. Since the frictional force is smaller on the slope, you might think that less energy is lost to friction on the slope. But, what matters is not the force but its product with the distance s over which it acts, specifically the work done by friction is Wf=-fs where the negative sign indicates that the friction takes energy away from the ball. When the ball is moving forward along along the segment L2, the distance it travels is s=L2/cosθ and so the work done is Wf=fs=(μmgcosθ)(L2/cosθ)=μmgL2, exactly the same as if the slope was not there. The total work done by friction, regardless of the path, is Wf=μmgL. The final velocity is then vhole=√[vputt2-2g(h+μL)].