#### Physics

###### What is terminal velocity and what causes it?

Terminal velocity is defined as the constant - and maximum - velocity that a free-falling object attains as it falls through a particular medium (like air, wate...

###### 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...

###### When going around a roundabout, why do I feel a force pulling me outwards?

A: This question perhaps encapsulates the wonder of Newtonian Mechanics in the most practical way! For this, let us immerse ourselves in this thought experiment...

###### "Draw a graph depicting a skydivers speed against time when jumping from a plane, until he deploys his parachute, explaining the logic of your answer through the forces applicable to the body."

Because we’re interested in seeing how the skydiver’s speed is changing with time, a velocity-time graph will be most relevant to us: not only does it have all...

###### State Newton's 3 Laws in words and/or mathematically

Newton’s first law of motion describes the scenario where no resultant force acts on an object. In such a case, it states that a body will maintain its state of...