To understand the standard formula for a sinusoidal traveling wave. one formula for a wave with a y displacement (e. g., of a string) traveling in the x direction is y(x, t)=asin(kx−ωt).
all the questions in this problem refer to this formula and to the wave it describes.
1) what is the phase ϕ(x, t) of the wave? express the phase in terms of one or more given variables ( a, k, x, t, and ω) and any needed constants like π
ϕ(x, t)=
2) what is the wavelength λ of the wave? express the wavelength in terms of one or more given variables ( a, k, x, t, and ω) and any needed constants like π.
λ=
3) what is the period t of this wave? express the period in terms of one or more given variables ( a, k, x, t, and ω) and any needed constants like π.
t=
4) what is the speed of propagation v of this wave? express the speed of propagation in terms of one or more given variables ( a, k, x, t, and ω) and any needed constants like π.
v=

Explanation:

The displacement of the string in the x direction is given by :

Where

A is the amplitude of wave

k is the propagation constant

1. Here, the phase of the wave is

2. The propagation constant of a wave is given by :

3. Since,

Time period,

4. Speed of this wave is given by :

Hence, this is the required solution.

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.

f is prop to m1xm2 double m1 double force