Category: Physics

Can humans see light speed? Yes. We can see the objects moving at speed of light. But we do not have that technology yet and we do not know if anything with mass can travel at speed of light. One can see objects if photons can reach his eyes even if he is travelling at […]

What is the highest form of intimacy? Level five is the highest level of intimacy. It is the level where we are known at the deepest core of who we are. Because of that, it is the level that requires the greatest amount of trust. Is kissing considered intimacy? Kisses that move the earth (or […]

What are the three levels of physical activity? Exercise is categorized into three different intensity levels. These levels include low, moderate, and vigorous and are measured by the metabolic equivalent of task (aka metabolic equivalent or METs). The effects of exercise are different at each intensity level (i.e. training effect). What are the aims of […]

What is the blue wire in a light fixture? The blue wire is the hot wire for the ceiling fan light fixture. The ceiling fan motor does not have a ground wire. What is the blue wire in headphones? Usually red wires are the right audio channel and blue wires are the left audio channel. […]

What is the relation between the angle of incidence and the angle of deviation? The angle through which the emergent ray deviates from the direction of incident ray is called angle of deviation ‘d’. As the angle of incidence is increased, angle of deviation ‘d’ decreases and reaches minimum value. If the angle of incidence […]

Why is the atmosphere essential for life? Atmosphere is very important for sustaining life: It contains various gases like O2, CO2, N2 which are required for various life processes by plants and animals. (ii) gas is used by plants to prepare food by the process called photosynthesis (iii) Oxygen is required for burning, combustion and […]

Which fuel produces the most energy per gram? Methane How much energy is released or absorbed when? Hence the energy released when 1gm of water at 0°C freezes to ice at 0°C is 334 J. Note – In order to answer this type of questions the key is to know the concept of latent heat […]

How much energy does fusion release? Each D-T fusion event releases 17.6 MeV (2.8 x 10-12 joule, compared with 200 MeV for a U-235 fission and 3-4 MeV for D-D fusion). On a mass basis, the D-T fusion reaction releases over four times as much energy as uranium fission. What are the cons of nuclear […]

How do you interpret a regression summary? The regression results comprise three tables in addition to the ‘Coefficients’ table, but we limit our interest to the ‘Model summary’ table, which provides information about the regression line’s ability to account for the total variation in the dependent variable. How is P value calculated in linear regression? […]

What is critical period in development? What is the critical period? Also known as the sensitive period, the critical period is a time during early postnatal life when the development and maturation of functional properties of the brain, its ‘plasticity’, is strongly dependent on experience or environmental influences. What are the five main areas of […]