El satélite que orbita alrededor de la Tierra se halla sometido a una fuerza centrípeta, que es la fuerza de atracción gravitatoria. Es decir, la fuerza que mantiene en órbita al satélite ligado a la Tierra es la fuerza gravitatoria. Para que exista una fuerza según los postulados de Newton debe existir una aceleración en el cuerpo, si sabemos que el periodo de la Luna alrededor de la tierra es de 29,53 días, el período de la órbita de la Tierra es 2,9X107s y el radio de su órbita es 1,5x1011m. Si el período de Neptuno es 5,2X109s, ¿cuál es el radio promedio de su órbita? Asumiendo que son trayectorias circulares (25%) Gracias por adelantado

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.

this is a good question! i'll do some research and come back when i have the answer!

no

sodium is solid at rt