PLEASE HELP WITH THIS ONE QUESTION Which of the following must be true for a current to be induced in a wire passing through a magnetic field?

A) the magnetic field and the direction of motion must be perpendicular

B) the magnetic field and direction of motion must be parallel

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2