Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move.
<em>hope this helps :)</em>
P.E = m*g*d
where m is the mass of body , d the vertical distance & g is the gravity acceleration and it equals constant = 9.81 m/s^2
so ,, P.E = 2 * 3 * 9.81
P.E = 58.86 N.m
Given the index of refraction, n and speed of light in the vacuum, c, we can solve for the speed of light in the transparent substance by the equation below.
n = c / v
where v is our unknown.
Substituting the known values,
1.7 = (3 x 10^8 m/s) / v
The value of v is equal to 1.76 x 10^8 m/s.
The slow process of turning of liquids to vapor form is called Evaporation.
The factors which effect the rate of evaporation are:
1. Wind assists evaporation.
2. Heat assists evaporation.
3. Increase in surface area exposed assists evaporation.
4. Dryness assists evaporation.
5. Rate of evaporation depends upon the nature of the liquid.
6. Vapor pressure: if pressure is applied on the surface of a liquid, evaporation is hindered