Answer:
Explanation:
applied Mechanics and its Growing Utilisation of Theoretical Mechanics.\
Structural Engineering.
Hydraulics.
Mechanical Engineering.
External Fluid Dynamics.
Planetary Sciences.
Life Sciences.
Most waves approach the shore at an angle. However, they bend to be nearly parallel to the shore as they approach it because when a wave reaches a beach or coastline, it releases a burst of energy that generates a current, which runs parallel to the shoreline.
- Most waves approach shore at an angle. As each one arrives, it pushes water along the shore, creating what is known as a longshore current within the surf zone.
- Waves approach the coast at an angle because of the direction of prevailing wind.
- The part of the wave in shallow water slows down, while the part of the wave in deeper water moves at the same speed.
- Thus when wave reaches a beach or coastline, it releases a burst of energy that generates a current, which runs parallel to the shoreline.
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Answer:
(a) 
(b) 
Explanation:
(a) We use Newton's law of universal gravitation, in order to calculate the gravitational force between electron and proton:
Where G is the Cavendish gravitational constant, 
and 
are the masses of the electron and the proton respectively and r is the distance between them:
The minus sing indicates that the force is repulsive. Thus, its magnitude is:
(b) We use Coulomb's law, in order to calculate the electric force between electron and proton, here k is the Coulomb constant and e is the elementary charge:
Its magnitude is:
Explanation:
Heat liberated by a body depends on the mass of the body, the specific heat capacity of that body and the change in temperature experienced by the body.
Heat energy by a body depends on the surface area of the body A as well as the temperature of body T.
According to Stefan's law, rate of heat energy radiated by a body is given by P=σAeT^4
Thus more is the temperature of body, more is the heat radiated. Also mores is the surface area of body, more is the heat radiated.
