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- Question
What is the escape velocity of the rocket in the earth is?
Options- A. 12.2 km/sec
- B. 10.2 km/sec
- C. 13.2 km/sec
- D. 11.2 km/sec
- Correct Answer
- 11.2 km/sec
- 1. Rear view mirror of car is convex or concave?
Options- A. Convex
- B. Concave
- C. Both A & B
- D. Can't be determined Discuss
- 2. The unit for measuring electric power is the
Options- A. Steridian
- B. Watts
- C. Watts
- D. Volts Discuss
- 3. Which measurement describes the pressure of a gas?
Options- A. 450 mm Hg
- B. 315 K
- C. 251 g/cub.cm
- D. None of the above Discuss
- 4. A voltaic cell converts chemical energy to
Options- A. Heat energy
- B. Electrical energy
- C. Mechanical energy
- D. Light energy Discuss
- 5. When an unbalanced force acts on an object
Options- A. causes change in motion of the object
- B. the speed & direction of the object will change
- C. causes the object to move
- D. All of the above Discuss
- 6. The flux commonly used in brazing is
Options- A. Ammonium chloride
- B. Borax
- C. Zinc chloride
- D. Resin plus alcohol Discuss
- 7. Gear finishing operation is called
Options- A. Burnishing
- B. Hobbing
- C. Shaping
- D. Milling Discuss
- 8. The mechanism of material removal in EDM process is
Options- A. Erosion and Cavitations
- B. Cavitations and Evaporation
- C. Melting and Evaporation
- D. Melting and Corrosion Discuss
- 9. Cryogenic Engines find applications in
Options- A. Frost - Free refrigerators
- B. Sub-marine propulsion
- C. Researches in superconductivity
- D. Rocket technology Discuss
- 10. One light year is approximately equal to
Options- A. 10^12 mts
- B. 10^16 mts
- C. 10^11 mts
- D. 10^13 mts Discuss
Physics problems
Search Results
Correct Answer: Convex
Explanation:
The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."
Correct Answer: Watts
Correct Answer: 450 mm Hg
Explanation:
450 mm Hg denotes the air pressure.
Correct Answer: Electrical energy
Correct Answer: All of the above
Explanation:
Unbalanced forces are the forces which causes change in motion of the object. It sets the object in motion and may cause the object to move. If the object is already in motion, it changes the speed and direction of the object.
Correct Answer: Borax
Correct Answer: Burnishing
Explanation:
Gear finishing operation is called Burnishing.
Correct Answer: Melting and Evaporation
Explanation:
Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges.
Correct Answer: Rocket technology
Explanation:
Cryogenic Engines find applications in Rocket technology. A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel or oxidizer, that is, its fuel or oxidizer are gases liquefied and stored at very low temperatures. Notably, these engines were one of the main factors of NASA's success in reaching the Moon by the Saturn V rocket.
Correct Answer: 10^16 mts
Explanation:
Light year is the unit of to express astronomical distances, that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 9,500,000,000,000 kilometers.
Approximately, 1 light year = 10^16 mts.
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