Car 1 drives 20mph to the south and car 2 drives 30mph to the north. from the frame of reference to car 1 what is the velocity of car 2?

To a Physics student riding in Car-1 and carrying

his frame of reference with him, he measures the

velocity of Car-2 to be 50 mph to the north.

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

uranium fissions/breaks up giving out energy and neutrons