Category: Physics

Why gravitation is always attractive? In the case of gravity, mediated by spin 2 particles, charge is mass, which is always positive. Thus, q1q2 is always greater than zero, and gravity is always attractive. For spin 0 force mediators, however, there is no restriction on the charges and you can very well have repulsive forces. […]

What is the difference between subduction zones and hot spots? Subduction zones are areas in which oceanic plates are overridden by continental plates, forcing the heavier oceanic crust deep enough to be melted and recycled as second generation magma. Hot spots provide information about the rates and directions of movement of tectonic plates over geologic […]

What is the relation between frequency and wavenumber? Frequency is a measurement of the number of wave cycles per second. Wavenumber is the reciprocal of the wavelength multiplied by a constant. Although they look the same, the difference is that wavenumber has nothing to do with the velocity of the wave- wavenumber is measured in […]

What is the hottest country in the world? Djibouti How hot is 40 degrees in Australia? In Central Australia, we find extreme temperatures sometimes it may reach up to 50 degrees and cannot see rains for years….Air Temperature. Degree Centigrade Degree Fahrenheit 31 88 35 95 38 100 40 105 Is Australia the hottest place […]

What should you squawk if you lose radio communications? 1) Squawk 7600 (Regardless Of Where You Plan To Land) By squawking 7600 (lost communications squawk code), ATC will know you’ve had a communications failure. What is two-way radio communication in aviation? Two-way radios are used by groups of geographically separated people who need to keep […]

Is tea a colloid suspension or solution? A mixture with particles that can be easily seen and separated by being filtered or settling. If you try to put too much sugar into a cup of tea, it will not fully dissolve and will leave some sugar on the bottom of the cup, making the tea […]

What is the ultimate original source of energy? The sun Is soil considered a living thing? The job of the organisms is to keep the soil healthy. carbon and mineral matter in the soil, and painting with soil. Soil is a living thing – it is very slowly moving, changing and growing all the time. […]

What evidence does the fossil record provide? Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species. Why are fossils so hard to find? Fossils are rare because their formation and […]

What is currently the most popular trait theory of personality? Trait theorists attempt to explain our personality by identifying our stable characteristics and ways of behaving. The Five Factor Model is the most widely accepted trait theory today. The five factors are openness, conscientiousness, extroversion, agreeableness, and neuroticism. These traits occur along a continuum. Is […]

Is Tokyo a metropolis? Under Japanese law, Tokyo is designated as a to (都), translated as metropolis. Its administrative structure is similar to that of Japan’s other prefectures. The Tokyo Metropolitan Government administers the whole metropolis including the 23 special wards and the cities and towns that constitute the prefecture. Is Metro an English word? […]