Dropping a nuke on another country.
A) Water is moving from a point of bigger height to a point of a lower height, This changes the kinetic and potential energies of water. Some of the kinetic energy of water is transfered to a waterwheel. This causes water wheel to spin. Spining waterwheel has rotational energy. Also waterwheel is rotating around certain point. This causes friction and there is frictional energy.
B)To light LED we need electric energy. To create electric energy we need a generator. Generator consists of a rotor (a magnet) and a stator (copper wire). If we attach a magnet to waterwheel and a wire somewhere close to waterwheel the electric energy would be induced. This energy can be used to light LED.
A reaction that requires FREE energy it must be non spontaneous so option b is correct.
Answer:
The angular magnification is
Explanation:
From the question we are told
The focal length is
The near point is
The angular magnification is mathematically represented as
Substituting values
Answer:
10.895 m
Explanation:
v = Velocity
g = Acceleration due to gravity = 9.81 m/s²
h = Height of waterfall = 5 m
Distance traveled by an object which has forward velocity is given by
The distance between them is 25.75181-14.85681 = 10.895 m