Uma particula de carga eletrica q= 2,0.10^-6c é lançada num campo magnético uniforme de intensidade B =4,0.10^ com velocidade v=20 m/s, sendo v perpendicular a B, conforme a figura. Determine a intensidade, a direção e o sentido da força magnética que atua na particula

explanation:

could i give you a exaplo that could you?

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.