#### Physics

###### 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...

###### The critical angle for a glass is 41 degrees. Calculate its refractive index.

Before we go into the actual solution, let us first understand what the critical angle is. It is defined as the angle of incidence within the denser optic mediu...

###### Give an example of a transverse and longitudinal wave.

A transverse wave is defined as a type of progressive wave wherein the particles of a medium oscillate in a direction perpendicular to the direction of wave pro...

###### Suppose a student wants calculate the density of the two different objects, a metal cube and a small statue. Describe the methods the student could use to measure the density of the two objects.

Let us first define density as the amount of mass contained per unit volume of an object. It is technically a ratio, and is calculated using the formula:So it i...

###### 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...