This question asks why an artificial satellite orbiting Earth does not fall down, despite Earth's gravitational attraction. The key to understanding this lies in the concept of orbital motion, where gravity plays a crucial role in continuously changing the direction of the satellite's velocity.
D) Provides the necessary acceleration for its motion. Earth's gravitational attraction acts as the centripetal force, providing the necessary centripetal acceleration that continuously changes the direction of the satellite's velocity, thereby keeping it in orbit around the Earth.
The question asks to identify the correct statements describing the differences between asteroids and comets. We need to evaluate each statement based on astronomical knowledge about these celestial bodies.
B) 1 and 3 only
Statements 1 and 3 are correct descriptions of the differences between asteroids and comets. Statement 2 is incorrect because comets are not primarily found between Venus and Mercury.
The question asks for the geological reason behind the Brahmaputra river's characteristic "U" turn before entering India. This phenomenon is a significant geographical feature related to the Himalayan mountain range's formation and structure.
Correct Option: B) Syntaxial bending of geologically young Himalayas
The question asks to identify features observed in the Himalayas that serve as evidence for them being young fold mountains. We need to analyze each given statement in the context of geological characteristics of young fold mountains.
All four statements describe features that are characteristic of young, tectonically active fold mountains like the Himalayas.
D) 1, 2, 3 and 4 — All the listed features (deep gorges, U-turn river courses, parallel mountain ranges, and steep gradients causing land-sliding) are strong pieces of evidence supporting the classification of the Himalayas as young fold mountains. They reflect ongoing tectonic activity, rapid uplift, and active erosion processes.
This question tests knowledge of world geography, specifically the location of prominent geographical features like plateaus, mountains, and basins. To answer correctly, one must identify the correct geographical region for each feature listed in the options.
Correct Option: B) Atlas Mountains: North-Western Africa
The question asks to identify the correct reason(s) why the Narmada River flows west, unlike most other large peninsular rivers that flow east. We need to evaluate each given statement based on geographical and geological facts about the Narmada River basin.
A) 1 only. Statement 1 correctly identifies the primary geological reason for the Narmada's westward flow. The river follows the gradient of the rift valley, which trends east-west.