Could a Black Hole Destroy Earth? Black holes do not wander around the universe‚ randomly swallowing worlds. They follow the laws of gravity just like other objects in space. The orbit of a black hole would have to be very close to the solar system to affect Earth‚ which is not likely. If a black hole with the same mass as the sun were to replace the sun‚ Earth would not fall in. The black hole with the same mass as the sun would keep the same gravity as the sun. The planets would still orbit
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adioisotopes: What Are They and How Are They Made?What are isotopes?The isotopes of an element are all the atoms that have in their nucleus the number of protons (atomic number) corresponding to the chemical behavior of that element. However‚ the isotopes of a single element vary in the number of neutrons in their nuclei. Since they still have the same number of protons‚ all these isotopes of an element have identical chemical behavior. But since they have different numbers of neutrons‚ these isotopes
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up that is familiar with it. -Max Planck Planck made many contributions to theoretical physics and the atomic theory. Planck’s theory (quantum theory) transformed our understanding of the atom and the subatomic process on an atom (of or belong to a process that occurs within an atom).Planck’s ideas were afterward used by Albert Einstein when he was building up the theory of relativity that changed the way we think of time and space. He entered the University
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Stephen Risley is the brother of the main character and focus‚ Elaine Risley‚ in the novel Cat’s Eye by Margaret Atwood. Stephen is a prodigy as a child and becomes a top physicist later is life. Much of the science enters Cat’s Eye through Elaine’s brother and he has an impressionable impact on her growth in the first years of her childhood. Growing up as nomads in tents‚ Elaine and her family were largely secluded from the ‘real world’‚ but through her brother Stephen‚ his games and casual
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(b) Write expressions for the position vector‚ the velocity vector‚ and the acceleration vector at any time t > 0. (c) Describe the path of the object in an xy plot. Section 4.2 Two-Dimensional Motion with Constant Acceleration 5. At t = 0‚ a particle moving in the xy plane with constant acceleration has a velocity of [pic] and is at the origin. At t = 3.00 s‚ the particle’s velocity is [pic]. Find (a) the acceleration
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REVIEWER FOR SCIENCE QUIZ BEE CONTESTANTS GRADE 7 1. A great Greek philosopher‚ he was the first person to study nature systematically. ARISTOTLE 2. He laid the foundation of modern scientific thought and assembled materials for an organized encyclopedia of all knowledge. ARISTOTLE 3. He was the foremost natural philosopher in ancient times. ARISTOTLE 4. A Benedictine nun‚ she contributed the medical work “Causea et Curae et Physica”. HILDEGARD OF BENGEN 5. An astronomer who proposed
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Earth’s four spheres Hydrosphere - dynamic mass of liquid that is always on the move Oceans - the most prominent feature of the hydrosphere 71% of Earth’s surface is covered by ocean which is 97% of Earth’s water Only 3% is fresh water - streams‚ lakes‚ glaciers and underground supplies Water Cycle - constantly recycles water Atmosphere Provides us with the air we breathe Protects us from the sun’s intense heat and radiation Protects us from space Biosphere Includes all life on Earth Interacts and
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by scientists in the nineteenth century. The atomic theory of matter was first proposed on a firm scientific basis by John Dalton‚ a British school teacher in 1808. His theory‚ called Dalton’s atomic theory‚ regarded the atom as the ultimate particle of matter (Unit 1). In this unit we start with the experimental observations made by scientists towards the end of nineteenth and beginning of twentieth century. These
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general public than many other books dedicated to the subject. It was one of the bestselling popular science books of 2005 in the UK‚ selling over 300‚000 copies.[1] instead describing general sciences such as chemistry‚ paleontology‚ astronomy‚ and particle physics. In it‚ he explores time from the Big Bang to the discovery of quantum mechanics‚ via evolution and geology. Bryson tells the story of science through the stories of the people who made the discoveries‚ such as Edwin Hubble‚ Isaac Newton
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n physics‚ energy is an indirectly observed quantity which comes in many forms‚ such as kinetic energy‚ potential energy‚ radiant energy‚ and many others; which are listed in this summary article. This is a major topic in science and technology and this article gives an overview of its major aspects‚ and provides links to the many specific articles about energy in its different forms and contexts. The question "what is energy?" is difficult to answer in a simple‚ intuitive way‚ although energy can
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