Practice
multiple choice
what material was baked under high heat to create a
filament for an electric lightbulb, causing it to glow for 13
hours?
a
titanium rods
b
sewing thread
c
copper wire
d
horse hair

Hi! I may not be much help, but here is what i think the answer is.

i think that the answer is b) sewing threads, based on books i've read about thomas edison, and what was available at the time period.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.