Horizon Gifts is involved in corporate gifting solutions for…

Horizon Gifts is involved in corporate gifting solutions for large companies. Cal is a long-time user of the service provided by Horizon Gifts, and he often suggests possible clients to the service’s sales representatives. Every time a lead Cal has provided actually makes a purchase, Cal receives a free gift, which might be anything from a can of assorted nuts to a wool muffler. Cal acts as a __________blank for Horizon Gifts.

A small ping-pong ball of mass m = 0.025 kg and charge q = 1…

A small ping-pong ball of mass m = 0.025 kg and charge q = 140 μC is suspended vertically by a string of length L = 0.5 m in an electric field of strength E = 2500 N/C.  In Case A, the electric field is directed vertically downward.  In Case B, the electric field is directed horizontally to the right causing the ping-pong ball to make an angle θ with the vertical. In Case A, what is the tension T in the string suspending the ping-pong ball?