A ray of monochromatic light (f= 5.09 x 10^14 Hz) in air is incident at an angle of 30° on a boundary with corn oil (n=1.47). What is the angle of refraction, to the nearest degree, for this light rat in the corn oil?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

conservation of mass

mass before something happens = mass afterwards