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Resistance is due to the collision of free electrons with the metal ions of the conductor. When the temperture increases, the metal ions have more energy and vibrate. This increases the frequency of colli...

For the riders to not fall out two forces acting on them must be equal, those forces being the gravity pulling them down towards Earth's surface and the centripetal force acting away from the centre of ro...

d=ut+0.5at²

so d=200m

Fuel rods provide fissionable elements such as uranium - 235 , The uranium abosrbs a neutron at thermal speeds (  energy transefered to the moderator) from previous reactions. This then enables the Uraniu...

The Youngs modulus of a material is = Stress / Strain. Therefore, the stress of an object is the strain multiplied by the Youngs modulus. We know that strain is the change in length (or extension) divided...