Suppose that a negatively charged balloon is used to charge an electroscope by induction. The procedural steps are described in the educational cartoon below. On the cartoon, draw the orientation of the needle and indicate the location and type of any excess charge in steps ii. - v. Explain in terms of electron movement what is happening in each step.

f=ma newton's second law 7x8=56n

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

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.