A22g bullet traveling 210 m/s penetrates a 2.0kg block of wood and emerges going 150m/s. if the block were stationary on a frictionless plane before the collision, what is the velocity of the block after the bullet passes through? what is the kinetic energy loss of the system?

speed of block is 0.665 m/s

Kinetic energy loss is 237.16 J

Explanation:

Here we can use momentum conservation as there is no external force on the system in horizontal direction

so here we will have

Now kinetic energy loss in the system is given as

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

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.