Answer:
<em>B. 4 . . . delta</em>
Explanation:
Low frequency delta wave type, high brain wave amplitude typical of stage 3 and stage 4 sleep.
Stage 3 and Stage 4 are defined as slow-wave sleeping characterized by delta waves predominance.
Stage 3 and Stage 4 of sleep are frequently referred to as deep slumber or slow-wave sleep since these phases are defined by lower frequency (up to 4 Hz), high delta waves.
Answer:
y=39.057 m
Explanation:
Using Kinematic relation

given u= 5m/s
a=g= -9.81
( directed downward)

Also, we know that
v=u+at
v=5-9.80t
at time t= 0.250 sec

s=0.94375 m
now position of sandbag
y= 40-0.94375
y=39.057 m
Answer: Light slows down.
Explanation: