Answer:
the electric field is proportional to the voltage divided by the separation of the plates,
Explanation:
This parallel plate configuration is widely used, as it creates a uniform electric field between the plates. Where the potential and field differences are related by
DV = E d
That is, the electric field is proportional to the voltage divided by the separation of the plates, in general all these configurations are called capacitors
The teachers uses parts of dialogue hope it help answer what need
The power is defined as the work done (W) by the transmission per unit of time (t) to accelerate the train:
To find the work done, we can use the work-energy theorem, which states that the work done is equal to the variation of kinetic energy of the train. Since the trains starts from rest, its initial kinetic energy is zero, so the work done is simply equal to the final kinetic energy:
where m is the mass of the train and
is its final velocity.
The mass of the train is m=0.875 kg while its final velocity is
, the work done by the electrical transmission is
And since this work is done in a time of t=20.5 ms=0.0205 s, the minimum power delivered is
Answer: E. None of the above
Explanation: The energy of a photon is given by the formula below.
E=hf or E = hc/λ
E = energy, h = planck constant, c= speed of light and
λ= wavelength.
From E=hf we can see that energy is directly proportional to frequency since h is a constant, this implies that as we move up the visible light spectrum, red light has the least frequency this accounting for the lowest energy while violet has the largest energy accounting for a very high energy.
Blue light is higher in the spectrum than red light.
This implies that blue light has more energy than red.
Visible light is part of the electromagnetic spectrum which implies that they all travel with the same speed of a constant value ( speed of light = 3* 10^8 m/s).
Thus in conclusion, blue light has more energy that red light but they both travel with the same speed.
This point nullifies the options thus making none of it correct.
Kepler used the observations of Tycho Brahe to formulate his laws of planetary motion. Kepler worked for Tycho in his lab during his younger years. Tycho liked Kepler's intelligence, and he respected his spunk, so he gradually showed him more and more of his precious measurements. This data was crucial in the development of Kepler's laws of planetary motion.