Answer:Light (electromagnetic) energy does not require a medium through which to travel.
Explanation:
Electromagnetic waves doesnt need to medium for travell
Ex ; Ultra violet rays , X rays
Sound waves needs to medium to travell but electromagnetic waves doesnt
Electromagnetic waves are constructed due to perpendicular electric field and magnetic field
Application of electromagnetic waves
Visible rays helps to see anything
IR rays is used in medical industry for cancer treatment
Answer:
The x-component of the electric field at point P -- 31,638.41
Explanation:
Given data:
charge density
Another charge density
Electric field due to infinite sheet of charge is given as E
= 31,638.41
Answer:
The necessary condition is that the force that is applied should not be able to produce any torque about the axis of rotation which is achieved only if the force passes through the axis of rotation.
Explanation:
Mathematically the angular momentum is related to force as
where
'r' is arm of the force 'F'
For angular momentum to be conserved the right hand side of the above equation should be zero which can happen only if:
1) F = 0
2) r = 0
3) F and r are parallel.
Thus fulfilling any of the above condition shall conserve the angular momentum of a particle.
Answer:
Freshwater solar ponds or freshwater floating collector type solar pond.
Explanation:
A shallow hole is dug and lined with concrete. A number of large black plastic bags, each filled with several centimeters of water, are placed in the hole and then covered with fiberglass insulation panels. The panels let sunlight in but keep most of the heat stored in the water during the daytime from being lost to the atmosphere. This heat can then be used to heat water and space. It cannot be used to generate electricity. This technology is called freshwater solar ponds or freshwater floating collector type solar pond.
- This type of solar pond technology is introduced to provide a cheap, renewable heat source which is used mainly for space - heating purposes. The freshwater solar pond is covered with floating collectors/ fiberglass insulation panels which are made of thin plastic sheet, insulation board and it also requires a little constructional work.
- In summary, the collector also provide thermal and evaporation insulation so that fresh water may be used when the pond gives reduction of mean collector and pond temperature and ensures high efficiency through forced flow in collector layer of pond.
Answer:
C
Explanation:
Kinetic energy is the energy of motion. It has the most potential energy at the top but the most kinetic at the bottom after it's accelerated fully down the slope.