Science Question-chemistry >easy 10
All the answers depend on buoyancy. That is the water pushing back up at an object, while the object is pushing down from gravity. It comes down to which is heaviest for the total volume. Seawater weighs about 68 pounds per cubic foot. If the object in questions weighs less than that, the force of the water pushing up against it will overcome gravity pulling down on it and it will float. If the object weighs more than 68 lbs/cubic ft, the buoyant force will not be strong enough to support it and it will sink. This is why your brick sinks, for the same volume it weighs more than water for the identical volume. A Submarine maintains neutral buoyancy by filling or emptying Variable ballast tanks with water to achieve the same weight as the water it displaces. If it wants to be slightly negative buoyant it fills the tanks with a little more water and will begin to descend, pumping out water will do the opposite. As I already explained Buoyant Force pushes up and gravity pulls down. It comes to the weight of the object verses the Weight of the water to determine if something will float os sink.
Physical science question! Help please!?
As a hydraulic press exerts an effort of 490 N through a distance of 1m, it raises a truck 0.25 m. What is the weight of the truck? I don't know how to solve this problem, someone help me pleaseee ? D:
Which is the best science: biology, chemistry or physics?
The best science is without doubt, physics since, thanks to quantum mechanics and Newtonian physics it explains all chemistry. Biological process on the other hand are basically explained as chemical reactions.However, it is also clear as a shiny day that Biology is much more fascinating, since understanding life is a little bit more exciting than understanding the lines of emission of the Hydrogen atom. Physics is as logical as a science can be, to the point that quantum mechanics is the most logical and irrational theory formulated by man (aside from theology, but that is another matter).Is chemistry easier to apply to real word situations? Well, if we like fairness and symmetry we would like to say yes. In fact chemistry is very useful and chemist might find an easy job in finding a position in the industry (although that is debatable). However, I cannot tell since “real world situations” is something vague. Chemistry deals basically with chemical reactions and there are many situations involving those in the industry and not so much in regular life, so I am afraid that physics is easier to apply. However, it might be argued that the development of chemistry changed our every day life (fertilizers, plastics, food industry) as much as the application of physics knowledge (electricity, TV, Internet). Electronics is kind of in the middle of physics and chemistry realm of applications..So physics is logical and departed from everyday life but tremendously insightful and challenging.Biology is absolutely fascinating: it is the endeavor of undertanding us. There is nothing more interesting. However, biology is a couple of decades from really understandin something. We understand how genes are translated, we can determine your genes, but to really comprehend how genes interact? We are just starting to scratch the surface and there is no comprehensive theory. So, do not try to find too much logic in biology. We are not there yet.Chemistry is the middle man. All chemistry process can be understood from first principles thanks to the impressive success of quantum mechanics. Chemistry is very close to human experience: it is complicated cooking with method and a strong theory. So, if you like to understand the intricate details of a chemical reaction and want to do something useful, Chemistry is for you. There are no that much of unanswered fundamental questions in chemistry, but there is a lot of fun in doing it right.I hope that this helps-
Is political science a science like physics or chemistry are sciences?
It is a science because it tests hypotheses about political behavior and institutional performance with both quantitative (statistics) and qualitative methods. Many of it's theoretical models and methodologies are derived from economics, which is another behavioral science that tries to understand economic behavior and the performance of economic systems.Think of it like this, psychology is the science that tries to understand how the brain works, how people make decisions, etc. but people don't exist in a vacuum, but in groups. As such, sociology is the science of trying to understand behavior of groups and how individual behavior interacts with socially shared norms and group behavior. But these groups also do not exist in a vacuum, but are influenced by formal and informal constraints and incentives that are derived from political institutions. This level of analysis is called political behavior. The kinds of questions that political scientist ask are things like "why do countries go to war," "does deterrence theory work," "do term limits undermine the quality of legislation," "why do states fail," "why do some democracies have 80 percent turnout but others only have about 50"? These are questions aimed at trying to understanding, describing, and possibly predicting patterns of political behavior.The biggest limitation to political science is its limited ability to do experimental designs with control and experimental groups (you can't really crash a nation's economy just because you are curious to see if the state fails or if it goes to war, for example). But the hard sciences don't always use experimental designs either. Astronomers, for example, can't set up a control and experimental group in which they collapse stars of different sizes to see which ones yield a black hole. Instead, their data comes from observing events that happened outside the lab in the "real" world and testing hypotheses with statistical tools. Another example would be that a biologist can't just decide to alter an ecosystem to see if a particular species would go extinct. In all of these cases there are practical and ethical limitations to such an approch. And even when the natural sciences do conduct experimental studies, they will still use pretty much the same statistical tools that social scientists use when looking at the world outside the lab to check their laboratory findings.
If math explains physics, physics explains chemistry, and the chemistry explains life, what does life explain and what explains math?
Physics is a way for us humans to make sense of the world we live in everything from the smallest elementary particles to the big galaxies far away from us. To describe the phenomena we see we us math. With this we can describe laws such as Newton’s law of motion or Coulomb’s law. These laws help us to understand the world into the finest details. Physics and chemistry are both physical sciences and they us each other to make sure we can understand our universe. Chemistry alongside with biology, geology and physics and other fields can explain life. One field can't explain everything on its own, but it can give a hunche, with multiple hunches from different perspectives one can figure out something. Life on the other hand is not a field in science but it is part of multiple science fields and physical phenomena. With life we can explain different things such as why there are oxygen in the atmosphere. But because life isn't a field on it own it is hard to ask the question what can life explain in that manner the OP did. Simultaneously one could argue that life and different life forms is so complex that it should be considered a field. Without life there would be no one to explain all the aspects of the universe. But who knows it is maybe as Elon Musk proclaims that we are just a simulation made by a higher developed entity, just as we have created games these entities maybe created us for the sake of entertainment.
Easy science question about physical & chemical changes?
My textbook tells me about it, but I just don't understand it!!! It just says that a physical change alters the form and a chemical change is something that undergoes a chemical change. That confuses me!!! I'm supposed to figure out if these following things a physical or chemical changes: glass breaking a rusting bicycle melting butter for popcorn glassblower creating sculptures out of glass freezing chocolate covered bananas separating sand from gravel spoiling food burning toast making salt water for sore throat mixing lemonade powder into water cream being whipped water evaporating from a pond cutting grass burning leaves humidifier putting moisture into air corroding metal bleaching you hair fireworks exploding squeezing oranges into orange juice frying an egg pouring milk into oatmeal I don't understand which is which!!!!!! How do I figure it out???? Can anyone explain this to me???
Physical Science, need help with one question, please.?
Neon is a noble gas and is therefore very stable, taking part in very few chemical reactions. This is due to its stable, full 8-electron structure on its outer shell. Lithium has a lone electron on its outer shell, which is repelled by the inner electrons and is therefore prone to leaving the atom to form an Li+ ion, which takes part in many reactions. eg: Lithium reacts with oxygen to form Lithium (II) oxide. Not sure about the determining part. Sorry :S
Chemistry question...?
Biological Scientist might look for strains in the DNA that explain a characteristic of the animal. For example to explain why the eel has a shock, or what give some lizards their camouflage abilities, or humans their water resistant skin. Biological Scientist have a great love of science also and often branch into every realm of the sciences. DNA is what makes you, you and me, me. It is the brainchild of life, the self made computer designer of all beings here.
Which is the most important science: chemistry, physics, or biology?
I’m going to approach this in a slightly different manner then the other comments. To answer you question in terms of introductory college level classes, then I would say understanding chemistry 100% would be the most important. Through proper understanding of chemistry, introductory biology classes make more sense. You see through your understanding of chemistry, why proteins fold the way that they do, α-helix or β-sheets. You also learn about the chemical properties of water in your chemistry class(es) and in your bio class, you learn why those properties are important to biological systems. In taking your chemistry class(es) you also learn some physics that governs molecules such as your kinetics equations. Physical structure of compounds. Physics, at the very introductory level, really has nothing to do with a college level biology class. You won’t need physics until you get into A&P, or in biomechanics, but those classes aren’t generally introductory in nature. Biology at the introductory level has nothing to with physics, in fact, most textbooks don’t even offer even a smidge of biophysics in their chapters, side notes, fun facts, sub-chapters, but they do offer a few chapters on chemistry, and chemistry is touched upon very frequently. So at the introductory college level, understanding chemistry is the most important. In real life, they all contribute to one another, and to say that one is more important than the other, is to downplay the importance of the sciences.