Answer:
B. The demand for building materials
Explanation:
The demand for housing was so high that the cost of rent soared. Because the speculators had inflated the economy, many American who had migrated to Florida could no longer afford to live here. At the same time, the demand for building materials overwhelmed the railway systems that transported them here.
Answer:
<h2>
<em><u>Samuel Morse</u></em></h2>
Explanation:
Telegraph was the device invented by Samuel Morse and other inventors in 1830's and 1840's. It revolutionised long distance communication and worked by transmitting electrical signal by a wire laid between two stations.
Samuel Morse also developed set of dots and dashes for each alphabet of English language so that complex messages could be transferred via telegraph lines. Samuel Morse sent the first telegraph between Washington D.C to Baltimore in 1844. By 1866, telegraph lines had been laid between Europe and Atlantic.
Answer:
b) the enslaved population increased rapidly
Explanation:
<u>Ibn al-Haytham:</u>
Ibn al-Haytham made huge advances in optics, science, and space science. His work on optics was described by a solid accentuation on painstakingly planned examinations to test speculations and theories.
Ibn al-Haytham is viewed as the dad of optics for his compelling The Book of Optics, which accurately clarified and demonstrated the cutting edge intromission hypothesis of visual observation, and for his analyses on optics, remembering tests for focal points, mirrors, refraction, reflection, and the scattering of light. Ibn al-Haytham's most significant work is Kitāb al-manāẓir ("Optics").
Despite the fact that it gives some impact from Ptolemy's second century promotion Optics, it contains the right model of vision: the latent gathering by the eyes of light beams reflected from objects, not a functioning spread of light beams from the eyes.
In his incredible exercise manual of Optics, Alhazen accurately distinguished that our eyes don't emanate beams. He contended that light influences the eye – for instance, we can harm our eyes by taking a gander at the sun – yet our eyes don't influence light.