The largest source of background radiation is radon
Answer:
![t=1.25\,s](https://tex.z-dn.net/?f=t%3D1.25%5C%2Cs)
Explanation:
In a thunderstorm the lightening is seen first then the roar of the lightening is heard because of the fact that speed of the light is much greater than the speed of the sound.
Given that:
Relation ![M=t\times 5.6](https://tex.z-dn.net/?f=M%3Dt%5Ctimes%205.6)
M= 7 miles
t=?
where:
t= time in seconds
M= distance in miles
Now,
Putting the given values in the relation above
![7=t\times 5.6](https://tex.z-dn.net/?f=7%3Dt%5Ctimes%205.6)
![t=1.25\,s](https://tex.z-dn.net/?f=t%3D1.25%5C%2Cs)
Answer:B. the total energy in the universe is in a state of flux
Explanation:
cause yes. trust me
Answer:
![I=68.31\times 10^{-6}\ A](https://tex.z-dn.net/?f=I%3D68.31%5Ctimes%2010%5E%7B-6%7D%5C%20A)
Explanation:
Given that
J(r) = Br
We know that area of small element
dA = 2 π dr
I = J A
dI = J dA
Now by putting the values
dI = B r . 2 π dr
dI= 2π Br² dr
Now by integrating above equation
![\int_{0}^{I}dI= \int_{r_1}^{r_2}2\pi Br^2 dr](https://tex.z-dn.net/?f=%5Cint_%7B0%7D%5E%7BI%7DdI%3D%20%5Cint_%7Br_1%7D%5E%7Br_2%7D2%5Cpi%20Br%5E2%20dr)
![I={2\pi B}\times \dfrac{r_2^3-r_1^3}{3}](https://tex.z-dn.net/?f=I%3D%7B2%5Cpi%20B%7D%5Ctimes%20%5Cdfrac%7Br_2%5E3-r_1%5E3%7D%7B3%7D)
Given that
B= 2.35 x 10⁵ A/m³
r₁ = 2 mm
r₂ = 2+ 0.0115 mm
r₂ = 2.0115 mm
![I={2\pi B}\times \dfrac{r_2^3-r_1^3}{3}](https://tex.z-dn.net/?f=I%3D%7B2%5Cpi%20B%7D%5Ctimes%20%5Cdfrac%7Br_2%5E3-r_1%5E3%7D%7B3%7D)
By putting the values
![I={2\pi \times 2.35 \times 10^5 }\times \dfrac{(2.0115\times 10^{-3})^3-(2\times 10^{-3})^3}{3}\ A](https://tex.z-dn.net/?f=I%3D%7B2%5Cpi%20%5Ctimes%202.35%20%5Ctimes%2010%5E5%20%7D%5Ctimes%20%5Cdfrac%7B%282.0115%5Ctimes%2010%5E%7B-3%7D%29%5E3-%282%5Ctimes%2010%5E%7B-3%7D%29%5E3%7D%7B3%7D%5C%20A)
![I=68.31\times 10^{-6}\ A](https://tex.z-dn.net/?f=I%3D68.31%5Ctimes%2010%5E%7B-6%7D%5C%20A)
Answer:
This ability of charged particles to do work is called an electric potential.
Explanation:
When two negative charges are brought close to each other, they also repel. But when a positive and a negative charge are brought close together, they attract each other. When these two opposite charges are combined, they can be used to work. This is why we need a positive (+) and a negative (–) to light a bulb or run any electrical tool, equipment, mobile phone or home appliance.