Explain how and why a so called permanent magnet can be demagnetized

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

How does an observation about an object differ from an inference about that object