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- Question
One light year is approximately equal to
Options- A. 10^12 mts
- B. 10^16 mts
- C. 10^11 mts
- D. 10^13 mts
- Correct Answer
- 10^16 mts
ExplanationLight 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.
- 1. Cryogenic Engines find applications in
Options- A. Frost - Free refrigerators
- B. Sub-marine propulsion
- C. Researches in superconductivity
- D. Rocket technology Discuss
- 2. 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
- 3. Gear finishing operation is called
Options- A. Burnishing
- B. Hobbing
- C. Shaping
- D. Milling Discuss
- 4. The flux commonly used in brazing is
Options- A. Ammonium chloride
- B. Borax
- C. Zinc chloride
- D. Resin plus alcohol Discuss
- 5. 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 Discuss
- 6. Speed in a given direction is called
Options- A. Velocity
- B. Torque
- C. Acceleration
- D. Displacement Discuss
- 7. Rotameter is used to measure
Options- A. Vortex flow
- B. Density of fluids
- C. Velocity of fluid in pipes
- D. Flow of fluids Discuss
- 8. Centrifugal force increases with
Options- A. Temperature
- B. Pressure
- C. Acceleration
- D. Humidity Discuss
- 9. Rate of doing work is called
Options- A. Capacity
- B. Energy
- C. Power
- D. Current Discuss
- 10. Which of these liquids has the highest viscosity?
Options- A. Milk
- B. Syrup
- C. Pineapple juice
- D. Water Discuss
Physics problems
Search Results
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: 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: Burnishing
Explanation:
Gear finishing operation is called Burnishing.
Correct Answer: Borax
Correct Answer: 11.2 km/sec
Correct Answer: Velocity
Explanation:
Speed in a given direction is called Velocity.
Correct Answer: Flow of fluids
Explanation:
A rotameter is a flow meter that measures volumetric flow of liquids and gases.
Correct Answer: Acceleration
Explanation:
Centrifugal force is the fictitious force that pulls out from the center on the body we feel while moving in the circular path. It increases with the rate of rotation of the axis i.e, acceleration of the body.
Correct Answer: Power
Explanation:
The Rate of doing work or rate of transfer of energy is called Power.
Correct Answer: Syrup
Explanation:
The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness".
Here in the given options, syrup has the highest viscosity.
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