Category: Physics

Is heat or ice best for pinched nerve? The combination of hot and cold increases the circulation of fresh blood to the area, which may help relieve pain. Hold an ice pack over the affected area for about 15 minutes at a time, three times a day to help reduce inflammation. Heat pads can be […]

What does conductivity depend on? What does conductivity depend on? It depends on the concentration, mobility, the valence state of the ionized species in a solution, and the temperature at which a measurement is taken. The higher the concentration of the ions in water, the higher the conductivity. How does thermal conductivity depend on density? […]

What is difference between mean and median? The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest. What is the difference […]

How do power lines kill birds? Birds can be injured or killed with they collide with electric lines in mid-flight. Although birds of all sizes and types collide with wires, their behavior and body type put them more at risk for line collisions. Can a human hang from a power line? Hanging from a power […]

How do you thank someone for an extremely generous gift? “Thank you very much for your extremely generous donation to me and my family. It is greatly appreciated and I can’t thank you enough. May God bless you and yours.” How do you say thank you on your last day at work? “Dear Colleagues, As […]

What is meant by the statement potential difference between A and B is 3v? Answer: If we say the potential difference between two points is 3 volt it does mean that 3 joule of work is done in moving a unit positive charge between those points. What is meant by saying that the potential difference […]

What are examples of loud sounds? Loud sound has a high volume while soft sound has a low volume. Banging of a hammer and a car’s horn are examples of loud sounds while playing of a piano and sound of blowing wind are examples of soft sounds. What are the examples of soft sounds? Soft […]

What are the advantages of generalized coordinates? The major advantage of using generalized coordinates is that they can be chosen to be perpendicular to a corresponding constraint force, and therefore that specific constraint force does no work for motion along that generalized coordinate. What is rigid body How many generalized coordinates will have to be […]

How do you determine a two-force member? If an element has pins or hinge supports at both ends and carries no load in-between, it is called a two-force member. These elements can only have two forces acting upon them at their hinges. If only two forces act on a body that is in equilibrium, then […]

How do we know the nucleus is positive? Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. In Rutherford’s experiments most of the alpha particles passed straight through the foil without being deflected. Is a nucleus positive? […]