1. A 1750 kg Ford Mustang Convertible and a 2222 kg Dodge Ram 4x4 truck were involved in a head on car crash. The Mustang initially moving at a velocity of 20 m/s rebounds off the truck with a
velocity of 12 m/s. After the collision, the Dodge Ram rebounds with a velocity of 5 m/s. What was
the velocity of the Dodge Ram before it collided with the Mustang?

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?