It may take up to 7-8 hours to go away completely
The answer you are are looking for is Regular heartbeat
Answer:
yes its true
Explanation:
please mark me as brainliest
Answer:
Independent: electronics in room
Dependent: hours of sleep
Control: school nights, night routine, lighting of room, the time the person decides to go to bed
Confounding: the person(?? not entirely sure on this one)
Answer:
the last one, Underwater weighing
