"for the instant represented, car a has an acceleration in the direction of its motion. car b is moving on a circular path and has a speed vb which is increasing. if the acceleration of b as observed from a is zero for this instant", determine the magnitude of acceleration of a and the rate at which the speed of b is changing

Both the cars would have same acceleration, then only car A is able to see zero acceleration of Car B. This is because, we know that car B is definitely accelerating as it is moving with speed in a circular path. Let the acceleration of Car B be , then .

The two cars A and B would have same acceleration i.e. the rate of change their velocities would be equal.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide