Two cars (one red, one blue) are both making a turn. Each vehicle has the same mass and turn radius but the red car is moving at twice the speed of the blue car. How do the centripetal forces acting on each vehicle compare?
Centripetal force is four times larger for the red car.
Centripetal force is two times larger for the red car.
Centripetal force is two times weaker for the blue car.
Centripetal forces are equal.

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?