Category: Physics

What were the major achievements of scholars in southwest Asia? They built huge, pyramid-shaped temple towers, and made advances in mathematics, astronomy, government, and law. Using a writing system called cuneiform (kew-NAY-ih-form), they produced great works of literature, including a poem known as the Epic of Gilgamesh. Why is the Middle East called Southwest Asia? […]

Why does it take 29.5 days for Moon? The Moon takes 29.5 days to return to the same point on the celestial sphere as referenced to the Sun because of the motion of the Earth around the Sun; this is called a synodic month (lunar phases as observed from the Earth are correlated with the […]

What muscle controls the amount of light entering the eye? iris What controls the amount of light entering the eye? Iris: The iris is the colored part of the eye that surrounds the pupil. It regulates the amount of light that enters the eye. Lens: The lens is a clear part of the eye behind […]

What is a deep crack that runs through the center of a mid-ocean ridge? Running along the top of this chain of mountains is a deep crack, called a rift valley. It is here that new ocean floor is continuously created. As the two sides of the mountain move away from each other, magma wells […]

What is Isthmus and its examples? Isthmus of Mansheya connects the island of Pharos to the mainland and Alexandria. The Isthmus of Panama is a famous isthmus in Central America because of the Panama Canal which was built through it. It links Costa Rica and South America and is between the Caribbean Sea and the […]

Which fruit has the highest potassium? Topic Overview Food (no table salt added) Serving size Potassium (mg) Apricots 2 raw or 5 dry 200 Artichoke 1 medium 345 Banana 1 425 Beans (lima, baked navy) ½ cup 280 Is peanut butter high in potassium? High-potassium foods (more than 200 mg per serving): 3 ounces of […]

Why do coastal communities experience high and low tides? Coastal areas experience two low tides and two high tides every lunar day, or 24 hours and 50 minutes. They are caused by the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun. When the highest point in the […]

Is thicker or thinner wire better for electromagnets? The electromagnet with the thick wire (12 gauge) consistently held more paperclips than the electromagnet with the thin wire (14 gauge). The difference however was not a significant one. The electromagnet with the thick core cosistently held more paperclips than the electromagnet with the thin core. What […]

Is Xenon shiny or dull? Xenon is a rare, odorless, colourless, tasteless, chamically unreactive gas. It was regarded as completely inert until, in 1962, Neil Barlett reported synthesis of xenon haxafluoroplatinate. In a gas filled tube xenon emits blue light when excited by electrical discharge. Can oxygen bond with fluorine? Oxygen and fluorine readily form […]

How many joules is a power strip? Energy absorption/dissipation – This rating, given in joules, tells you how much energy the surge protector can absorb before it fails. A higher number indicates greater protection. Look for a protector that is at least rated at 200 to 400 joules. For better protection, look for a rating […]