What level of radiation is harmful?

What level of radiation is harmful? To cause death within hours of exposure to radiation, the dose needs to be very high, 10Gy or higher, while 4-5Gy will kill within 60 days, and less than 1.5-2Gy will not be lethal in the short term. However all doses, no matter how small, carry a finite risk […]

What is the highest court in the United States?

What is the highest court in the United States? The Supreme Court of the United States What are 2 kinds of legal cases? More specifically, federal courts hear criminal, civil, and bankruptcy cases. And once a case is decided, it can often be appealed. What are the three most common types of civil cases? These […]

What two cells work together in protein synthesis?

What two cells work together in protein synthesis? The two cell structures that are involved in protein synthesis are the ribosome and the endoplasmic reticulum. How the cell is like a factory? A cell can be thought of as a “factory,” with different departments each performing specialized tasks. A cell’s plasma membrane regulates what enters […]

What replaced Copernicus?

What replaced Copernicus? Copernicus disposed of the equant, which he despised, but replaced it with the mathematically equivalent epicyclet. Astronomer-historian Owen Gingerich and his colleagues calculated planetary coordinates using Ptolemaic and Copernican models of the era, and found that both had comparable errors. Why was Aristarchus’s model not accepted? Also, the ratios of distance to […]

Why do whales moan?

Why do whales moan? Various baleen whales moan, but only the males of a few species really sing well: humpback, minke, some blue and fin whales, and the more distantly related bowhead whales. It has been suggested that, when underwater, air can be moved between these sacs and the lungs, allowing whales to sing without […]

What is the ideal following distance?

What is the ideal following distance? The rule of thumb is to maintain at least a three-second following distance, giving you time to react and avoid potentially dangerous situations. You can calculate this by using a fixed object, such as a pole or an overpass to determine how far in front of you the car […]

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