Marbles rolling down The ramp and horizontally of your desk and assistant land 70 cm from the base of your desk. Your desk and 73 cm high. If you pull your desk over to the window of your second story room and "launch" marbles to the ground (6.68 m  below the desktop) how far into the yard with marbles land?

6.39 meters

Explanation:

t=sqrt(2d/g)

convert cm to m t=sqrt(2*0.73/9.81) t=0.1488 seconds

v=d/t v=0.70/0.1488 v=4.7m/s

Now, the new time out the window is t=sqrt(2*6.68/9.81) t=1.36 seconds

d=vt d=(4.7)*(1.36) d=6.39 meters!

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.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.