Answer:
a)
b)
c)
d)
Explanation:
From the question we are told that:
Diameter
Conductivity
Electron mobility
Electric field
a)
Generally the equation for Charge Density is mathematically given by
Therefore
b)
Generally the equation for current density is mathematically given by
c)
Generally the equation for current in wire is mathematically given by
d)
Generally the equation for electron draft velocity. is mathematically given by
We know that frequency is an inverse value of time this implies that time is the inverse value of frequency .
Now since <em>f</em> is <em>40kHz</em><em>,</em><em> </em>we can calculate period or duration for that matter time.
Hope this helps.
r3t40
The energy required to heat a substance is related by the formula:
Q = mCpΔT ; where Q is the energy, m is the mass of the substance, Cp is the specific heat capacity and ΔT is the change in temperature.
2000 = (4)(Cp)(5)
Cp = 100 Joules / g °C
Answer with Explanation:
"Wind" is abundant everywhere, thus it becomes one of the options for producing <em>electricity</em> in the world. Although it is said to be one of the cleanest sources, it also has an environmental impact on the society.
One of these is the amount of land that is being used when wind turbines are being installed. The wind turbines are the ones which allow the conversion of wind to electricity. Those that are located offshore require <u>bigger spaces. </u>
Another impact is <em>its threat to flying animals like birds and bats.</em> Some claim that these animals sometimes <em>collide with the wind turbines that spin causing their death.</em>
The wind turbines also produce noise pollution that <u>bothers residents who are living nearby. </u>
These are just some of the environmental impacts that occur when wind energy is converted into electricity.