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  • Angles

    Q

    The critical angle is the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.



    A
  • Progressions

    Q

    Given Sn�= 1/7(3n2��+ 7n)

    S1�= 10/7

    S2�= 26/7.

    Therfore First term a1�= 10/7 &� Second term a2�= 26/7-10/7= 16/7 and d = 16/7-10/7=6/7

    Now nth�term an�= 10/7 + ( n- 1) 6/7

    a20�= 10/7 + 19x6/7

    A
  • Tectonics

    Q

    The Earth's crust is made up of huge slabs called plates, which fit together like a jigsaw puzzle. These plates sometimes move. The friction causes earthquakes and volcanic eruptions near the edges of the plates. The theory that explains this process is called plate tectonics.

    plate tectonics-
    The basic idea behind plate tectonics is that there are eight major plates on the surface of the Earth. There are also bunches of minor plates. The plates are like the skin of the planet. They constantly move around the planet. When we say constantly moving, we're talking centimeters each year.

    A
  • Q

    The second reason is due to the angle of the sun. During summer note that the majority of the sky is a deeper blue at sunrise and sunset, than it is during the middle of the day when the sun appears directly overhead. When the sun is near sunset for you, it is directly overhead for people who are  living west of you. The sun's rays are reaching you at a shallower angle and are not lighting up as much of your sky. People living further east of you are already in darkness. In winter the angle of the earth in its orbit places the sun lower in the sky, from your perspective. Even at midday the sun can appear to be quite near the horizon. In the northern hemisphere, the sun appears to be close to the southern horizon in winter. Conversely, in the southern hemisphere, the sun appears to be close to the northern horizon in winter. Above the Arctic circle (or below the Ant-Arctic circle) the sun is so low in mid-winter that it does not rise above the horizon for part of the winter. The bulge of the earth is between the Arctic dwellers and the sun. So the lower angle of the sun creates the deeper blue of a darker sky even at midday in winter.

    A
  • Circumcenter

    Q

    The steps to find the circumcenter of a triangle:

    • Find and Calculate the midpoint of given coordinates or midpoints (AB, AC, BC)
    • Calculate the slope of the particular line
    • By using the midpoint and the slope, find out the equation of line (y-y1) = m (x-x1)
    • Find out the other line of equation in the similar manner
    • Solve the two bisector equation by finding out the intersection point
    • Calculated intersection point will be the circumcenter of the given triangle

    A
  • Q

    The brain and spinal cord together make up the central nervous system (CNS). ... The spinal cord functions primarily in the transmission of neural signals between the brain and the rest of the body but also contains neural circuits that can independently control numerous reflexes and central pattern generators.

    A
  • Q

    The product of average force and the time it is exerted is called the impulse of force. From Newton's second law. the impulse of force can be extracted and found to be equal to the change in momentum of an object provided the mass is constant: Calculation.

    A
  • Q

    Arterial walls are actually thicker to cope with the high pressure. It is easier for a thin-walled vessel to rupture than a thick-walled vessel.In veins, because there is no pressure, blood has to be able to flow back fairly rapidly to be used again. Because of this, veins have larger lumens to allow blood to pass more quickly when not under pressure.

    A
  • Q

    Telangana is arranged on the Deccan Platue, in the focal extend of the eastern seaboard of the Indian Peninsula. The locale is depleted by two noteworthy waterways, with around 79% of the River Godavari catchment zone and around 69% of the River Krishna catchment zone, however the majority of the land is dry. Telangana is likewise depleted by a few minor streams, for example, the bhima, the maner, the manjira and the musi.

    The yearly precipitation is somewhere around 900 and 1500 mm in northern Telangana and 700 to 900 mm in southern Telangana, from the southwest storms. Different soil sorts proliferate, including chalkas, red sandy soils, dubbas, dark red loamy soils, and profound dark cotton soils that encourage planting mangoes, oranges and blossoms.

    A
  • tense

    Q

    Tenses are time references. They denote time of action. There are three main time references: Past, Present and Future.
    Past: The actions that happened in the past are mentioned in the past tense which further divides in simple past, past continuous, past perfect and past perfect continuous.
    Present: The actions that happen in present time are mentioned in the present tense which further divides in simple present, present continuous, present perfect and present perfect continuous.
    Future: The actions that will happen in future are mentioned in the future tense which further divides in simple future, future continuous and future perfect.

    For a detailed understanding, visit:
    https://learnenglish.britishcouncil.org/en/english-grammar/verbs/present-tense

    A

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