NAVY STENO PAST PAPERS 2023 TO TILL DATE
NAVY 5
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- a= F /m
- a= m /F
- a = v × t
- None of these
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Explanation
The formula for acceleration is a = F/m,
Where
'a' is acceleration,
'F' is net force,
'm' is mass.
سب سے اونچے مقام پر کسی چیز کی سرعت کیا ہوگی؟
- 9.0 M/S downward
- 9.6 M/S downward
- 9.8 M/S downward
- None
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Explanation
At the highest point of its trajectory, an object thrown upwards has a vertical acceleration due to gravity,
Which is approximately 9.8 m/s² downwards.
While the object's vertical velocity is momentarily zero at the highest point,
The acceleration due to gravity continues to act on it.
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RY12-02-23
- Pa.s
- Nm
- Kg
- None
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Explanation
The SI unit of viscosity is the pascal second (Pa·s) or kg·m−1·s−1.
Common symbols: η, μ
Derivations from other quantities: μ = G·t
گرمی کے جذب سے ٹھوس ریاست کو مائع ریاست میں تبدیل کرنے کے عمل کو ______ کہا جاتا ہے؟
- Condescension
- Evaporation
- Melting
- None of these
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Explanation
Melting is the process where a solid turns into a liquid by absorbing heat.
It occurs at a specific temperature called the melting point.
گیس کس عمل کے دوران مائع بن جاتی ہے؟
- Melting
- Freezing
- Condensing
- Boiling
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Explanation
Condensing is the process by which a gas changes state to become a liquid.
This occurs when the temperature and pressure of the gas are reduced to the point where the molecules slow down and come together to form a liquid.
Key Points:
- Melting is the process where a solid becomes a liquid.
- Freezing is the process where a liquid becomes a solid.
- Boiling is the process where a liquid becomes a gas.
سورج سے خارج ہونے والی توانائی کی وجہ کیا ہے
- Nuclear fission
- Nuclear fusion
- Both a &b
- None of these
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Explanation
The energy emitted by the sun is primarily due to nuclear fusion reactions in its core.
Specifically, hydrogen atoms are fused into helium atoms, releasing a tremendous amount of energy in the process.
This energy is then radiated outwards as light and heat.
- Proteins
- Fat
- Calories
- None of these
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Explanation
The energy value of food is most commonly measured in kilocalories (kcal),
Which are also commonly referred to as "Calories".
- Of gravity on a 1 g body
- Of gravity on a 1 kg body
- That gives a 1 kg body an acceleration of 1 m/s²
- None of these
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Explanation
A Newton (N) is the unit of force in the International System of Units (SI).
Force (F) is equal to mass (m) times acceleration (a): F = ma.
"That gives a 1 kg body an acceleration of 1 m/s²".
Using F = ma, if m = 1 kg and a = 1 m/s², then F = 1 kg × 1 m/s² = 1 N.
وَرک یا انرجی کی ایس آئی اکائی کیا ہے؟
- Horsepower
- Hertz
- Joule
- Ampere
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Explanation
The SI unit of work or energy is the joule (J)
- Definition: Work done when a force of one newton moves an object one meter in the direction of the force.
- Expression: 1 J = 1 N·m
- Base units: Equivalent to kg·m²/s²
- Named after: James Prescott Joule, the English physicist
- Common multiples: Kilojoule (kJ = 10³ J), megajoule (MJ = 10⁶ J)
- Physicists
- Mathematician
- Philosopher
- All of these
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Explanation
Albert Einstein, a renowned physicist, revolutionized physics with his theory of relativity.
He made significant contributions to mathematics and philosophy as well.
Einstein is celebrated as one of the most influential physicists of the 20th century.
It notably publishing four landmark papers in 1905.
