Why are there no parallel lines on a sphere? In spherical geometry Parallel lines DO NOT EXIST. In Euclidean geometry a postulate exists stating that through a point, there exists only 1 parallel to a given line. Therefore, Parallel lines do not exist since any great circle (line) through a point must intersect our original […]
Why do we use copper and not silver or graphite for electrical wiring in our houses give a reason for each?
Why do we use copper and not silver or graphite for electrical wiring in our houses give a reason for each? Unlike silver which in its natural state is a metal like copper, the form of graphite with very low resistivity to compare with copper is graphene. Technically its not a metal which can be […]
What causes trichromatic vision?
What causes trichromatic vision? The normal explanation of trichromacy is that the organism’s retina contains three types of color receptors (called cone cells in vertebrates) with different absorption spectra. In actuality the number of such receptor types may be greater than three, since different types may be active at different light intensities. What causes Tetrachromatic […]
How do you calculate watts?
Is F2 a single or double bond?
Which type of contraction builds muscle faster?
Which type of contraction builds muscle faster? Combining eccentric and concentric muscle contractions produces greater results in strength training, as it increases muscle strength and mass. How many types of muscle contractions are there? three types What is responsible for causing muscle contractions? 1. A Muscle Contraction Is Triggered When an Action Potential Travels Along […]
Why do atoms get bigger across a period?
Why do atoms get bigger across a period? 4 Answers. As you move from left to right across a period, the number of protons in the nucleus increases. These lower energy levels shield the valence electrons from the attractive effects of the atom’s nucleus, so the atomic radius gets larger. Why do atoms get smaller […]
How fast can a freight train accelerate?
How fast can a freight train accelerate? The final factor and one frequently overlooked is the tractive effort required for acceleration of the train. It takes about 10 pounds per ton to accelerate to a speed of 6 miles per hour in one minute or 12 miles per hour in two minutes, a reasonable rate […]
How many neutrons does 19 9 F?
How many neutrons does 19 9 F? 10 neutrons Is fluorine-19 an ion? According to the periodic tale, fluorine, F, has an atomic number of 19. We can conclude that fluorine gained an electron to reach a stable octet configuration, and because it has an extra electron it is now called a fluorine ion. Why […]