Aparticle with charge q = +1e and mass m = 6.5×10-26 kg is injected horizontally with speed 2.1×106 m/s into the region between two parallel horizontal plates. the plates are 24 cm long and 1.5 cm apart. the particle is injected midway between the top and bottom plates. the top plate is negatively charged and the bottom plate is positively charged, so that there is an upward-directed electric field between the plates, of magnitude e = 33 kn/c. ignore the weight of the particle.

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

measure their densities same density, same sub

a is the best answer your welcome

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.