Category: Physics

When 5800 joules of energy are applied to a 15.2 kg piece of lead metal How much does the temperature change by? Answer: 2.98 K Thus change in temperature is 2.98 K. Why is only a small amount of water poured on hot rocks? Why do you think only a small ladle-full of water is […]

How do maglev trains start moving? Maglev trains work on the principle of magnetic repulsion between the cars and the track. To begin motion, the train moves forward slowly on these wheels, allowing the magnets beneath the train to interact with those of the guideway. How does maglev trains run without wheels? This junkyard crane […]

What Crystal shape is best? Learn what 7 common crystal shapes mean—and how to best use them. Cubes. If you need some grounding vibes in your life (don’t we all?), a cube-shaped crystal might be the perfect gemstone companion for you. Pyramids. Spheres. Tumbled stones. Crystal points. Hearts. Clusters. What are the basic types of […]

Will a high pH kill fish? Very high (greater than 9.5) or very low (less than 4.5) pH values are unsuitable for most aquatic organisms. Young fish and immature stages of aquatic insects are extremely sensitive to pH levels below 5 and may die at these low pH values. High pH levels (9-14) can harm […]

What are ionic compounds called? Ionic compounds are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions. For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the […]

How many years are in an era? An era in geology is a time of several hundred million years. It describes a long series of rock strata which geologists decide should be given a name. An example is the Mesozoic era, when dinosaurs lived on the Earth. An era is made up of periods, and […]

How many hours exactly is a day? 23 hours How is day calculated? Day can be defined as each of the twenty-four-hour periods, reckoned from one midnight to the next, into which a week, month, or year is divided, and corresponding to a rotation of the earth on its axis. Why is a day not […]

What is an example of a fusion reaction? Nuclear fusion is a process in which atomic nuclei are fused together to form heavier nuclei. Like fission, nuclear fusion can also transmute one element into another. For example, hydrogen nuclei fuse in stars to form the element helium. Is nucleosynthesis a fusion? Stars fuse light elements […]

What are the five innate human characteristics? The five innate human characteristics infant reflexes. ex: infants will suck something when it is put to their lips. an interest in novelty. a desire to explore and manipulate objects. an impulse to play and fool around. basic cognitive skills. What is the simplest type of innate behavior? […]

How can earthquake be prevented? We cannot prevent natural earthquakes from occurring but we can significantly mitigate their effects by identifying hazards, building safer structures, and providing education on earthquake safety. By preparing for natural earthquakes we can also reduce the risk from human induced earthquakes. What is the longest earthquake? Valdivia Earthquake Is a […]