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.

b ti isnfornopgnoernfrof

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.