Liquids have

fixed shapes and volumes
fixed shapes and variable volumes
variable shapes and fixed volumes
variable shapes and variable volumes

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

the energy generated by an individual's metabolism is calculated in met (metabolic equivalent of task). the met is the ratio of the work metabolic rate to the resting metabolic rate. one met is illustrated as 1 kcal per kilogram per hour, and is probably equal to the energy cost of sitting quietly.

1 met is equal to 1.162 watt per kg

1 kg is equal to 1000 grams

as the person weighs 80000 gm, that is, 80 kg.

therefore, 80*1.162 = 92.96

thus, the person expends 92.96 watts of power while at rest.