The energy of a given wave in the electromagnetic spectrum is 2.64 × 10-21 joules, and the value of planck’s constant is 6.6 × 10-34 joule·seconds

4.00 × 1012 hertz
2.34 × 10-12 hertz
1.30 × 1013 hertz
2.52 × 10-6 hertz
8.11 × 10-7 hertz

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples