Subject Answers

A: Before I dive into the relationship between resistance and voltage in a filament lamp, it is important to first understand what type of a conductor a filamen...

In order to understand what 1 volt is, we have to first see what is a “volt” used for!The volt - or V - is the SI unit for potential difference, which is define...

A: In order to understand the validity of the Big Bang Theory, we would like to first understand what the red shift is. The red shift is a phenomenon wherein wa...

To understand this, we have to take it step by step. Firstly, if the speed is doubling, then that means kinetic energy increases by a factor of 4, since:K.E = 1...

A: Here we will use the specific heat capacity - i.e. the amount of heat energy needed to raise or lower the temperature of a substance of mass 1 kg by 1 deg C...

A: a) Voltage in essence is a measure of the amount of work done per unit charge as it moves through a circuit. Now, voltage can be differentiated into two type...

A: A PET scanner is used to locate tumours using what we call a radiotracer: a safe radioactive chemical that is injected into the body. A higher concentration...

A: The word “terminal” means “extreme” - so terminal velocity means an extreme or maximum velocity achieved as an object falls through the air due to gravitatio...

A: X-rays and gamma rays are both part of the electromagnetic spectrum, with both having high frequencies and short wavelengths. Of the two, gamma rays have the...

A: When a small droplet of water is placed on a phone screen, it forms a curved semi-sphere and so acts as a convex lens. Because of its small curvature, this m...