Plzzz help!! A stationary speed gun emits a microwave beam at 2.10x1010 Hz. It
reflects off a car and returns 1030 Hz
higher. What is the speed of the car?
(Unit = m/s)

The speed of the car is 14.7m/second or 15 m/second approximately.

Explanation:

A microwave beam at is generated by a stationary speed gun. It bounces off a car and returns at a higher frequency of 1030 Hz. The car's observed frequency would be the product of adding the two frequencies. That is to say,

       F = =

Using doppler effect formula

Where

F = observed frequency

f = source frequency

C = speed of light =

V = speed of the car

 Putting the values in the formula -

by cross multiplication ,

   300000014.7 - 1.000000049V =

    Collect the like terms  

1.000000049V = 14.71429

      Make V the subject of formula

V =

V = 14.7 m/s

Therefore , the speed of the car is 15m/second approximately.

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.