In the hot summer, a reptile can burrow into a cool, damp surface so that it can lose heat through ___ since its skin is touching those surfaces.
A) conduction B) convention C) radiation

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?