A butterfly is an insect. It belongs to which of these groups of invertebrates?
A
sponges

B
mollusks

C
cnidarians

D
arthropods

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?