Which pair of properties apply to both sound and electromagnetic waves?
a) both waves carry energy and refract.
b) both waves are longitudinal and carry energy.
eliminate
c) both waves are transverse and need a medium.
d) both waves carry energy and do not need a medium to travel through.

The answer would be A because sound waves and electomagnetic waves carry energy and they can both refract.

- measure reactants precisely. ( first choice)

- stir to the reaction take place. ( second choice)

- wait patiently until the reaction completes. ( fourth choice)

- make sure to recover as much copper as possible. ( last choice)

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)