Una partícula oscila con movimiento armónico simple de 20 cm de amplitud y 1,8 s de período. Calcula la elongación, velocidad y aceleración cuando ha transcurrido un tercío de período

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

Idon’t quite understand this problem

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units