What creates the magnetic field in an electromagnet?

a electric current through a straight piece of metal

b magnetic fields around a straight wire

c electric current through a wire coil

d all of these

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Electrochemical cells provide energy by allowing electrons to flow through an external circuit to electrodes contained in an electrolyte