Light travels in electromagnetic waves in the form of photons. What do photons travel in? Can a frequency have weight? Carry weight? According to Einstien a photon with energy proportional to its frequency basically explains ultraviolet light(among other things), so does that mean light travels within a "larger" version of itself?
We know that light doesn't need a medium through which to travel because the speed of light is experimentally constant: independent of the movement of the source or detector or the direction in which it travels.
Light contrasts with sound, which travels through the air (or some other material medium). If you're stationary with respect to the air, then the speed of sound is the same in all directions. But if you're moving with respect to the air, the speed of sound will be the same in all directions relative to the air---which means that sound coming up in front of you will seem faster and sound catching up to you from behind will seem slower.
If light were a disturbance in a medium, it would exhibit the same behaviour. But light never does---its speed is the same under all circumstances. So it does you no good to postulate an aether. You can still do it, but it makes the theory more complicated than necessary. The only reason to postulate an aether is that you're uncomfortable with the idea of waves not needing a medium. But our modern understanding of quantum mechanics is that all kinds of particles have a wavelike nature, so, if you accept that matter can travel through empty space, you should have no problem accepting the same for light.
so it's true
Soil<span> can be used to </span>generate electrical<span> power in microbial fuel cells (MFCs), which convert chemical energy from </span>soil<span> organic compounds into </span>electricity<span> via catalysis by </span>soil<span> source exoelectrogenic microorganisms. The process of </span>soil<span> power generation has several potential applications. </span>
Answer:
The last significant figure is inherently uncertain because of the rounding off. The rounding-off uncertainty is usually half of the last figure's decimal-place value if no other uncertainty is expressed. As a rule of thumb results of measurements and calculations have a limited number of significant figures.
Answer:
the answer will be about 126 rad/s
Explanation:
Answer: 600watts
Explanation:
Power of crane = ?
Work done by crane = 15000 J
Time taken = 25s
Recall that power is the rate of work done per unit time
i.e Power = work/time
Power = 15000J/25seconds
Power = 600watts
Thus, the power of the crane is 600watts
