General Science

    Everyday Science
    Thickness of asteroid belt is:
    Author: rikazzz Comment
    Elements and Substances
    Which non-metal is essential for life and inhaled during breathing?
    The non-metal that is essential for our life and we inhale during breathing is oxygen. Oxygen is a colorless, odorless gas that makes up about 21% of the Earth’s atmosphere. It is essential for respiration, which is the process of using oxygen to release energy from food. Oxygen is also essential for many other biological processes, such as the production of ATP, the body’s main source of energy.
    Author: rikazzz Comment
    Everyday Science
    What is the name of the stage in Earth’s orbit when it is farthest from the Sun?
    The stage in which Earth is farthest from the Sun is classified as aphelion. Aphelion occurs every year around July 4th. At aphelion, Earth is about 94.5 million miles (152.1 million kilometers) from the Sun. This is about 3.4 million miles (5.5 million kilometers) farther than Earth’s closest approach to the Sun, which occurs every year around January 3rd.
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    Elements and Substances
    Which of the following is used as a fuel in space rockets ?
    Liquid oxygen is the most common oxidizer used in space rockets. It is highly reactive and helps to produce a powerful combustion reaction.
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    Elements and Substances
    How many nonmetals are in gaseous state ?
    There are 11 nonmetals that are in gaseous state at room temperature. They are: Hydrogen, Helium, Nitrogen, Oxygen, Fluorine, Neon, Chlorine, Argon, Krypton, Xenon and Radon.
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    Elements and Substances
    How many non-metals are solids at room temperature excluding metalloids?
    Carbon, phosphorus, sulfur, selenium, and iodine are all non-metals. They are all solids at room temperature.
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    Space and Solar System
    What the area of outer solar system that is stretched across 20 Astronomical Unit in space is called?
    The area of outer solar system that is stretched across 20 Astronomical Unit in space is classified as the Kuiper Belt. It is a region of the solar system that is located beyond the orbit of Neptune. It is home to many small icy objects, including comets. The Kuiper Belt is thought to be a remnant of the solar system’s formation.
    Author: rikazzz Comment
    Space and Solar System
    What kind of eclipse occurs when the Moon is at its farthest point in its orbit around Earth?
    An annular eclipse occurs when the Moon is at its farthest point in its orbit around Earth (called apogee), and the apparent diameter of the Moon is smaller than the apparent diameter of the Sun. As a result, the Moon cannot completely cover the Sun, and a ring of sunlight is visible around the Moon.
    Author: rikazzz Comment
    Atomic Structure
    The mass of a neutron is
    The mass of a neutron is about the same as that of a proton. A neutron is a subatomic particle with no net electric charge and a mass slightly greater than that of a proton. Together with protons, neutrons make up the nucleus of an atom. The mass of a neutron is 1.67492749804 × 10−27 kg, which is slightly greater than the mass of a proton, which is 1.672621777 × 10−27 kg. The mass of an electron is much smaller, at 9.10938356 × 10−31 kg.
    Author: rikazzz Comment
    Dispersion of Light
    Long-sight defect could be corrected by using lens:
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