A12-kg hammer strikes a nail at a velocity of 8.5 m/s and comes to rest in a time interval of 8.0 ms. (a) what is the impulse given to the nail? (write the unit for impulse as a kg. m/s or as n. s)

The impulse is 102 kg m/s.

Explanation:

Given that,

Mass of hammer = 12 kg

Velocity = 8.5 m/s

Time = 8.0 ms

Impulse :

Impulse is the change in momentum of the object.

We need to calculate the impulse

Using formula of impulse

Where, m = mass of the object

v = final velocity

u = initial velocity

Put the value into the formula

Hence, The impulse is 102 kg m/s.

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.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers