(a) suppose that a nascar race car is moving to the right with a constant velocity of +82 m/s. what is the average acceleration of the car? (b) twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. what is the average acceleration of the car?

Diamond will scratch quartz. true or false

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2