Space Missions
Maharashtra Board · Class 10 · Science
Flashcards for Space Missions — Maharashtra Board Class 10 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is an artificial satellite?
Answer
An artificial satellite is a manmade object that revolves around the Earth or any other planet in a fixed orbit. It is sent into space to perform various functions like communication, weather forecast…
What is the formula for critical velocity of a satellite and what do the variables represent?
Answer
Critical velocity: vc = √(GM/(R + h)) Where: G = Gravitational constant = 6.67 × 10⁻¹¹ N m²/kg² M = Mass of the earth = 6 × 10²⁴ kg R = Radius of the earth = 6400 km h = Height of satellite above eart…
List the six main types of artificial satellites based on their functions.
Answer
1. Weather satellites - Study and predict weather 2. Communication satellites - Establish global communication 3. Broadcast satellites - Television program telecasting 4. Navigational satellites - Fix…
What are the three types of satellite orbits based on height above Earth's surface?
Answer
1. Low Earth Orbit (LEO): 180 km to 2000 km height - Used for scientific experiments, atmospheric studies - Complete revolution in ~90 minutes 2. Medium Earth Orbit (MEO): 2000 km to 35780 km h…
What is a geosynchronous satellite and why is it important?
Answer
A geosynchronous satellite orbits at exactly 35780 km above Earth's surface, taking 24 hours to complete one revolution - same as Earth's rotation. This makes it appear stationary relative to Earth's …
What is escape velocity and what is its value for Earth?
Answer
Escape velocity is the minimum velocity needed for a spacecraft to escape Earth's gravitational force and travel to outer space. Formula: vesc = √(2GM/R) For Earth: vesc = 11.2 km/s This means any s…
Name India's major satellite series and their functions.
Answer
1. INSAT & GSAT - Weather, communication, and broadcasting (launched by GSLV) 2. IRS - Earth observation and remote sensing (launched by PSLV) 3. IRNSS - Indian Regional Navigation Satellite System fo…
How do satellite launch vehicles work and why are multi-stage vehicles used?
Answer
Working Principle: Based on Newton's third law - hot gases from fuel combustion are expelled forcefully through rear nozzles, creating thrust that propels the vehicle upward. Multi-stage design benef…
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