Answer:
the only thing thats confusing me is no ?
Explanation:
please explain thank you :)
Answer:
Her error was that she did not subtract 12 from 8 correctly
Explanation:
Jackie did 8-12 instead of 12-8
Answer:
The magnetic field of the particle is 1.5 T.
(C) is correct option.
Explanation:
Given that,
Momentum of particle 
Radius = 1.0 km
Charge of the particle 
We need to calculate the magnetic field
Using relation of radius of path in magnetic field
Here mv = p

Put the value into the formula


Hence, The magnetic field of the particle is 1.5 T.
Planck's constant is 4.39048042 × 10-67 m4 kg2 / s2.
Answer:
Explanation:
Resistivity and resistance are proportional and depends of the length and the cross-sectional area of the wire:

furthermore, the density is the mass divided by the volume, and the volume can be written as the area multiplyed by the length:

Now you have tw equations and two variables, so you can solve for each of them.
first, solve for A in both equations and replace them:


now replace this into any of the previous equiations:

If you assume the wire has circular cross-sectional area, then the area is:

solving for d:

replacing A and simplifying:
![d=2 \sqrt[4]{\frac{m\rho}{\rho_m R \pi^2} }](https://tex.z-dn.net/?f=d%3D2%20%5Csqrt%5B4%5D%7B%5Cfrac%7Bm%5Crho%7D%7B%5Crho_m%20R%20%5Cpi%5E2%7D%20%7D)