Which of the following describes a temporary magnet

1, a magnet that always acts as a magnet
2, a magnet that acts as a magnet as long as there is an external magnetic field
3, is a magnet even if there is a magnetic field or not
4, is always a magnet

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

Which articulations allow for greatest range of motion?