Category: Physics

What is the weight of a 25 kg object on earth? The mass would be definitely the same. This Wiki article on Weightlessness would be useful… There are different system of units like gravitational,SI, MKS. I have seen in some text as slug as the unit of mass in gravitational system.So mass of 25 kg […]

How are art and science similar and different? Arts and science are similar in that they are expressions of what it is to be human in this world. Both are driven by curiosity, discovery, the aspiration for knowledge of the world or oneself, and perhaps, as the conceptual artist Goshka Macuga said on her recent […]

What is the magnetic domain theory? The domain theory states that inside a magnet there are small regions in which the magnetic direction of all the atoms are aligned in the same directions. These regions are known as domains. Within a domain, the aligment of the magnetic direction is the same. How do you identify […]

Are moles conserved in a chemical reaction? A chemical reaction, balanced in terms of moles, contains the same number of atoms of each element, before and after the reaction. This means that all the atoms and its masses are conserved. Why are moles not conserved during a chemical reaction? But the moles of EACH ATOM […]

Is velocity directly proportional to tension? From equation (2) we see that the square of the wave velocity is, in turn, directly proportional to the tension, since the linear density μ is constant in this experiment. It follows that the square of the wavelength should be directly proportional to the tension. Does tension affect velocity? […]

What is SI unit of Joule? The SI unit for energy is the joule (J): 1 J=1 newton metre (N m). Another unit is the calorie (cal), which is defined as the heat required to raise the temperature of 1 g of pure water by 1°C at 1 atm pressure. What is the meaning of […]

Can you strengthen your diaphragm? Diaphragmatic breathing is a type of a breathing exercise that helps strengthen your diaphragm, an important muscle that helps you breathe. This breathing exercise is also sometimes called belly breathing or abdominal breathing. It has a number of benefits that affect your entire body. What can be done for a […]

Who decides if a case is heard by the Supreme Court? The U.S. Supreme Court decides to hear a case based on at least four of the nine Justices of the Supreme Court agreeing to grant the Petition for Certiorari. If four Justices agree to grant the petition, the Supreme Court will consider the case. […]

What is a good RMSE? For a datum which ranges from 0 to 1000, an RMSE of 0.7 is small, but if the range goes from 0 to 1, it is not that small anymore. However, although the smaller the RMSE, the better, you can make theoretical claims on levels of the RMSE by knowing […]

What can a reader determine from details in the sentences? What’s going on, where the characters are, whats going to happen, what’s happening. These are a few that the reader might determine from the details in just a sentence. How does using a quotation adds credibility to a writer’s ideas? How does using a quotation […]