HELP DUE SOON Select the true statement(s) about the electromagnet spectrum:

a The light we see is a portion of the electromagnetic spectrum.

b Everyday items, such as microwaves and cell phones, use the electromagnetic spectrum.

c Only stars emit electromagnetic radiation in the electromagnetic spectrum.

d The electromagnetic spectrum is only used when exploring space.

e The Sun emits electromagnetic radiation in the electromagnetic spectrum.

Acarpenter is driving a 15.0-g steel nail into a board. his 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. what is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? the specific heat of steel is 448 j/kg ∙ k. a) 2.7 k b) 1.8 k c) 7.7 k d) 8.1 k e) 3.6 k