A0.46-kg cord is stretched between two supports, 7.2 m apart. when one support is struck by a hammer, a transverse wave travels down the cord and reaches the other support in 0.74 s.
what is the tension in the cord? (express your answer to two significant figures and include the appropriate units.

      T = 6.0 N

Explanation:

given,

mass of the cord = 0.46 Kg

length of the supports = 7.2 m

time taken to travel = 0.74 s

tension in the chord = ?

using formula for tension calculation

v = 9.73 m/s

now, calculation of tension

      T = 6.0 N

The tension in the cord is equal to 6.0 N.

whichever one it is, it's definitely not one that you included on the list you provided.

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.