EVERYDAY SCIENCE
Download PDF Click here
فری تیاری کیلے Whatsappجوائن کریںClick
here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- 110 J
- 100 J
- 120 J
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Mass = 500 g = 0.5 kg.Kinetic energy = ½ × mass × velocity².
KE = ½ × 0.5 × 20² = 100 J.
Last verified on 26-10-2026
آئن سٹائن کی کمیت اور توانائی کی مساوات میں 'سی' سے کیا مراد ہے؟
- Speed of electron
- Speed of Earth
- Speed of light
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Einstein's mass-energy equation is E = mc^2.
- In this equation, E represents energy, m represents mass, and c represents the speed of light in a vacuum.
- The speed of light in a vacuum is approximately 3 x 10^8 metres per second.
- The equation shows that mass can be converted into energy and energy into mass.
Last verified on 26-10-2026
پانی کی زیادہ سے زیادہ کثافت _____ ہے؟
- 2°C
- 3°C
- 4°C
- 5°C
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Water has maximum density at 4°C.
- When Water is in its Solid form (Ice) below 0°C.
Last verified on 27-10-2026
- 4.31 × 10⁻⁴ N
- 5.61 × 10⁻⁴ N
- 2.67 × 10⁻⁴ N
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Given:m1 = 1000 kg
m2 = 1000 kg
r = 0.5 m
G = 6.67 x 10^-11 Nm^2/kg^2
Formula: F = G x m1 x m2 / r^2
F = 6.67 x 10^-11 x 1000 x 1000 / (0.5)^2
F = 6.67 x 10^-11 x 1000000 / 0.25
F = 6.67 x 10^-5 / 0.25
F = 2.67 x 10^-4 N
Last verified on 26-10-2026
ہیڈ ٹو ٹیل رول کے ذریعے قوتوں کو جمع کرنے کے لیے کم از کم کتنی قوتیں درکار ہوتی ہیں؟
- 1
- 2
- 3
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The minimum number of forces required to use the head-to-tail rule for vector addition is two.
- In this method, the tail of the second force vector is placed at the head of the first force vector.
- The resultant force is drawn from the tail of the first vector to the head of the last vector.
- This rule can also be used to add three or more forces.
Last verified on 26-10-2026
- 5 Nm
- 10 Nm
- 15 Nm
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Torque is the turning effect of a force around a pivot.
Distance = 10 cm = 0.1 m.
Torque = 100 × 0.1 = 10 Nm.
Last verified on 26-10-2026
- 1400 J
- 1600 J
- 1500 J
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Potential energy depends on mass, gravitational acceleration, and height.
PE = 50 × 10 × 3 = 1,500 J.
Last verified on 26-10-2026
- 240 kJ
- 241 kJ
- 242 kJ
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Mass = Weight ÷ g = 12,000 ÷ 10 = 1,200 kg.
- Kinetic energy = ½ × mass × velocity² = ½ × 1,200 × 20² = 240,000 J = 240 kJ.
Last verified on 26-10-2026
ان میں سے کون سا جیواشم ایندھن ہے؟
- Petroleum
- Coal
- Natural gas
- All of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Petroleum, Coal, and Natural gas are all fossil fuels.
- They are non-renewable energy sources
- Major contributors to global energy production.
- Coal: A solid fossil fuel primarily derived from ancient swamp plants.
- Petroleum (Oil): from the remains of marine microorganisms like plankton.
- Natural gas: Composed of methane, often found in underground deposits alongside petroleum or coal
Last updated on 06-March-2026
کوئی جسم غیر جانبدار توازن میں کب ہوتا ہے؟
- Is situated at its bottom
- Is at its lowest position
- Maintains its height after being displaced
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- A body is in neutral equilibrium when its centre of gravity remains at the same height after being displaced.
- The body stays in its new position because its potential energy does not change.
- Example: A ball rolling on a flat horizontal surface is in neutral equilibrium.
Additional information:
- In stable equilibrium, the centre of gravity rises when the body is displaced.
- In unstable equilibrium, it falls.
Last verified on 26-10-2026
