The amount of a radioactive isotope present in a certain sample at time t is given by A(t) = 500e^-0.02828t grams, where t years is the since the initial amount was measured. How long will it take for the amount of the isotope to equal 317 grams

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop