Abus has velocity 20m/s towards east and another bus has velocity 15m/s in west direction. If they start to move from a point simultaneously, what
distances do they cover in 2 minute? What will be their separation?

Distances covered by each bus 1800 [m] & 2400 [m]

The separation = 4200 [m]

Explanation:

To solve this problem, a kinematics study should be carried out, where the movements of both buses in opposite directions are analyzed and, at the end, logically add the possible values obtained.

The time in seconds 2 [min] = 120 [s]

For the bus moving towards west:

x = - 15* 120 = - 1800 [m]

For the bus moving towards east:

x = 20* 120 = 2400 [m]

The separation is easily calculated as the arithmetic sum of both displacements, the negative sign of the bus moving westward, represents only a movement opposite the other bus.

Separation = 1800 + 2400 = 4200 [m]

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.