#### Physics

###### Explain what is meant by tensile stress and tensile strain.

Tensile stress is formally defined as the force exerted on an elastic object per unit cross-sectional area.It has the same units as that of pressure, which are...

###### How do I derive Kepler's 3rd law using Newton's Law of gravitation, in the case of a circular orbit?

Before we dive into the derivation of Kepler’s Third Law from Newton’s Law of gravitation, we have to first understand what each of these laws means. First off,...

###### What is the angular velocity of a person standing on the surface of the earth. Give your answer in radians per second

One can think of angular velocity as just the angular version of regular linear velocity: i.e. if linear velocity is defined as the rate of change of displaceme...

###### What is the 'centre of gravity' of an object and how do I calculate it?

The ‘centre of gravity’ is a point through which the entire weight of an object seems to act through. I say ‘seem to’ because in reality, the object’s weight wo...

###### How do you use a Variable Resistor to determine values to show the relationship between I and V?

From the name itself, you can guess an important feature of the variable resistor: it’s resistance can vary. So with every new value of resistance, the amount o...

###### State Faraday's Law of electromagnetic induction, both qualitatively and quantitatively. How is Lenz's Law included in this?

Faraday’s Law of electromagnetic induction states that the emf induced in a conductor is directly proportional to the rate of change of magnetic flux. Quantitat...

###### "How do I derive Kepler's 3rd law using Newton's Law of gravitation, in the case of a circular orbit?"

Before we dive into the derivation of Kepler’s Third Law from Newton’s Law of gravitation, we have to first understand what each of these laws mean. First off,...