1 point 2A student pushes a box of books with a force of 10 N and moves it
200cm. What work have they done? Use the equation: work done (J) =
force (N) x distance (m)
a) 2100
b) 1903
c) 20
d) 2000 J

Adielectric-filled parallel-plate capacitor has plate area a = 30.0 cm2 , plate separation d = 9.00 mm and dielectric constant k = 3.00. the capacitor is connected to a battery that creates a constant voltage v = 15.0 v . throughout the problem, use ϵ0 = 8.85x10-12 c2/n. m2 . find the energy u1 of the dielectric-filled capacitor.