Author Question: A 45.0-kg person steps on a scale in an elevator. The scale reads 460 N. What is the magnitude of ... (Read 280 times)

@Brianna17 · **on:** Jul 29, 2018

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 N. What is the magnitude of the acceleration of the elevator?

A) 0.422 m/s2 B) 4.91 m/s2 C) 46.9 m/s2 D) 0.206 m/s2 E) 9.81 m/s2

Question 2

How does a permanent magnet work, i.e., what is the explanation of its magnetic effects?

A) Electric charge is permanently separated within the magnet, with positive static charge at one end and negative static charge at the other end of the magnet.
B) Electrons orbiting individual atoms in the magnet are all aligned together so that their orbital motion produces a large overall effect.
C) The material of the magnet is highly ionized, with one type of ion residing on one end of the magnet and the other type of ion residing on the other end.
D) Subatomic particles known as magnetic poles are placed on each end of the magnet, with one type of pole placed on one end and the other type on the other end.
E) Magnets are a communist plot.