The waste products of combustion leave the internal combustion engine through the
a. cylinder.
b. intake valve.
c. crankshaft.
d. exhaust valve.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Will you chech and finish these for me, because i am stumped with them.

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?