Aboy kicks a football from ground level with an initial velocity of 20 m/s at an angle of 30° above the horizontal. what is the horizontal distance to the point where the football hits the ground if we neglect air resistance? a.60 m b.18 m c.30

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

What happens when a rubber rod is rubbed with a piece of fur?