Category Archives: physics

जब हामी लगाएको लुगा अचानक फुकाल्न खोज्छौं, हाम्रो शरिर  र लुगा बिच घर्षण भई ताप शक्ती उत्पन्न हुन्छ जसले लुगामा भएका अणुहरुको स्थानान्तरण भई लुगामा रिणात्मक चार्ज उत्पन्न हुन्छ र शरिरमा धनात्मक चार्ज उत्पन्न हुन्छ । धनात्मक चार्ज ऋणात्मक चार्जतिर बहन थाल्दछ। जसले गर्दा  लुगा शरिरतिरै टँसिन्छ। र उक्त चार्जको स्थानान्तरणले गर्दा लुगामा स्थिर बिद्युतContinue reading “जब हामी लगाएको लुगा फुकाल्न खोज्छौं, लुगामा झिल्का उठेको जस्तो देखिन्छ(राती) र लुगा जिउमै टाँसिन खोज्छ, किन?”

The rear wheels are made large and flst to reduce the pressure. It prevents the tyre from descending into the muddy land.

The density of iron is more than that of water. Iron nail sinks in water because weight of the nail is greater than the weight of water displaced by it. But a ship made up of iron specially designed in such a way that the relative density of ship is always less than that ofContinue reading “An iron nail sinks in water but a ship made up of iron floats, why?”

The density of iceberg(0.917 g/cm३) is less than that of water(1 g/cm३). so iceberg(huge mass of ice) can displace the water equal to their weight. Therefore, icebergs float in water

Torricelli vacuum : A vacuum is created when a glass tube is filled by mercury and inverted in a vessel containing a level of mercury. The level of mercury from the tube falls down as allowed by the atmospheric pressure and vacuum is created at the bottom of the tube. It is called Torricelli Vacuum,Continue reading “Torricelli vacuum”

Body falls towards earth due to gravity. The acceleration due to gravity is inversely proportional to the radius of the earth . As we know that the earth is not perfectly spherical,so radius of earth in equator is greater than that in poles. So the value of ‘g’ is greater in poles. Thats why theContinue reading “Body falls faster in poles and slowly in equator why?”

Ans: As we know that: weight(w)= mass(m)×accelearation due to gravity(g) The value of ‘g’ is more at the bottom of a mountain due to less radius and less at the top of the mountain due to more radius (•.• g is inversly proportional to square of the radius) . Therefore, the weight of an objectContinue reading “Weight of a body is found less at the top of a mountain than at the bottom of it, why?”