A66.5-kg person throws a 0.0495-kg snowball forward with a ground speed of 30.5 m/s. a second person, with a mass of 59.5 kg, catches the snowball. both people are on skates. the first person is initially moving forward with a speed of 2.20 m/s, and the second person is initially at rest. what are the velocities of the two people after the snowball is exchanged?

First person (66.5kg) has a speed of 2.18 m/s

Second person(59.5kg) has a speed of 0.025 m/s

Explanation:

Assume the ball maintain constant speed of 30.5 m/s, neglecting air resistance. When the 1st person throw it, their momentum must be conserved before and after the throw

where m = 0.0495 kg, m1 = 66.5kg are the masses of the first person and the ball. v1 = 2.2m/s, V1, v = 30.5 m/s are the speed of the first person before, after, and the speed of the ball, respectively.

Similarly, the momentum for the 2nd person-ball system must be the same before and after the catch. Knowing that he is initially at rest:

where m2 = 59.5, v2 are the mass the speed of the 2nd person after the catch:

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

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.