In riot control, the riot squad uses a water hose that shoots water at a rate of 5 m/s and volume of 30 L/s. What is the average force exerted on a person assuming that the water splashes sideways in all directions? The density of water is 1000 kg/m3.

The average force exerted on a person assuming that the water splashes sideways in all directions is 150 newtons.

Explanation:

From Fluid Mechanics and Newton's Laws we know that water stream is an example of a variable mass system at constant speed and the magnitude of the net force done by the water splash (), measured in newtons, is given by the following expression:

(Eq. 1)

Where:

- Density of water, measured in kilograms per cubic meter.

- Volume flow rate, measured in cubic meters per second.

- Flow velocity, measured in meters per second.

If we know that , and , the average force exerted on a person is:

The average force exerted on a person assuming that the water splashes sideways in all directions is 150 newtons.

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.