If R = 4.0 kOhm, C = 3.0 mF, ℰ = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb-Va in the circuit segment shown? a.+8 V
b. -19 V
c. -3 V
d. +3 V
e. -8 V

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain