A woman weighs 52 N. What is her mass on Earth?

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Plss anybody know how to do this? ? i need the answers from a through d

The softest and hardest minerals are: softest hardest