## Lakshya Education MCQs

Question: The atmospheric air is held to the Earth by :
Options:
 A. Gravity B. Winds C. Clouds D. Rotation of the Earth

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## More Questions on This Topic :

Question 1. The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with
1.    Pascal's law
2.    Newton's law
3.    Bernoulli's principle
4.    Archimedes' principle
Question 2. A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because
1.    Stone is heavier than parachute
2.    Special mechanisms are present in parachute
3.    A parachute has a larger surface area and air resistance is more
4.    None of these
Question 3. Why does bleeding occur through the nose in high mountainous regions ?
1.    The pressure of blood in capillaries is greater than the outside pressure
2.    The pressure at high altitudes is greater than that on the plains
3.    The blood pressure of a person increases at high altitudes
4.    The blood pressure fluctuates and finally decreases drastically
Question 4. The slope of a velocity-time graph represents
1.    Acceleration
2.    Displacement
3.    Distance
4.    Speed
Question 5. What does the slope of a velocity time graph represent?
1.    Acceleration
2.    Distance
3.    Speed
4.    Momentum