Answer:
I should be V or E I am not sure what you mean by unit.
Answer:
Construction pulleys are used in order to lift and place heavy materials. Curtains at a theatre are moved using pulley systems that pull the curtains apart. Blinds on windows operate using a pulley system to move the blinds up and down.
Answer:
The magnetic field is 
Explanation:
From the question we are told that
The inner radius is 
The outer radius is 
The distance from the axis of the conductor is 
The current carried by the conductor is 
According to Ampere's circuital law , the magnetic field at a point that is
from the axis of the conductor
![B = \frac{\mu_oI}{2 \pi d } [\frac{d - r_1}{r_2 -r_1} ]](https://tex.z-dn.net/?f=B%20%3D%20%20%5Cfrac%7B%5Cmu_oI%7D%7B2%20%5Cpi%20d%20%7D%20%5B%5Cfrac%7Bd%20-%20r_1%7D%7Br_2%20-r_1%7D%20%5D)
Where
is the permeability of free space with a value of
substituting values
![B = \frac{(4 \pi *10^{-7})(80)}{2 * 3.142 * 2 *10^{=3} } [\frac{(2^2 - 1 ^2 )*10^{-3}}{(3^2 - 1^2) *10^{-3}} ]](https://tex.z-dn.net/?f=B%20%3D%20%20%5Cfrac%7B%284%20%5Cpi%20%2A10%5E%7B-7%7D%29%2880%29%7D%7B2%20%2A%203.142%20%2A%202%20%2A10%5E%7B%3D3%7D%20%7D%20%5B%5Cfrac%7B%282%5E2%20-%201%20%5E2%20%29%2A10%5E%7B-3%7D%7D%7B%283%5E2%20-%201%5E2%29%20%2A10%5E%7B-3%7D%7D%20%5D)

The best represent the size of visible light will be C. Protozoa
The electromagnetic spectrum, gives the overall distribution of electromagnetic radiation by the frequency or wavelength. All EM waves travel at the speed of light in a vacuum, but over a wide range of frequencies, wavelengths, and photon energies.
Visible light wavelengths cover the range of approximately 0.4 to 0.7 μm. electromagnetic spectrum that the human eye can see is the Visible light. Visible light is a form of electromagnetic (EM) radiation, along with radio waves, infrared, ultraviolet, X-rays, and microwaves. the wavelengths that are visible to most human eyes is generally known as Visible light
the best represent the size of visible light is Protozoa, According to the diagram of the electromagnetic spectrum shown,
Learn more about electromagnetic spectrum here brainly.com/question/25847009
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