PHI 1000C Lecture 13: Philosophy notes 13

. Fill in the nine gaps in this table.

Symbol Ar, __________, _________
Protons _______, 10, ___________
Neutrons _______, 10, ___________
Electrons ________, __________, 6
Mass number 40, ________,12

Two charges, Qa= 5 μC and Qb= -6 μC, are spaced 20cm apart. Findthe change in potential energy as a point charge Qc=4μC moves from(1) the midpoint between Qa and Qb to (2) 5 cm to the left of Qa,directly opposite of Qb.

Two charges, Q_A = 5 μC and Q_B = -6 μC, arespaced 20 cm apart. Find the change in potential energy as a pointcharge Q_C = 4 μC moves from (1) the midpoint betweenQ_A and Q_B to (2) 5 cm to the left ofQ_A, directly opposite of Q_B.

a. 3J

b. 4J

c. 5J

d. 6J

e. 7J