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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 mean. First off,...

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If, Rate of thermal enerfy transfer = 2.7kwVolume of a water tank = 4.5m^3Water temperature = 28°CDensity of water =  1000kgm-3 & c=4200Jkg-1K-1What will be the rise in water temperature the heater can produce in 1 hour?

A: When it comes to solving numerical questions, it really helps to first write out the main equation, and see what quantities do we need:We can now see that we...

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"Find current and voltage across resistors R1 and R2, when they connected in parallel and in series. A 12V battery is connected, R1=4Ω and R2=3Ω."

Let us first arrange our resistors R1 and R2 in parallel, and see what we getHere, we have to acknowledge that since R1 and R2 are sharing the same two junction...

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Define light, critical and heavy damping in simple harmonic motion.

Damping refers to the phenomenon where an object undergoing oscillations experiences resistive forces, such that it causes the amplitude of oscillations to decr...

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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...

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What is the de Broglie wavelength? Why do we care?

The de Broglie wavelength is the wavelength associated with what we call matter waves - i.e. waves associated with particles that are in motion. Now, do keep in...

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"An infared wave has a wavelength of 1.5 x10^–6 m. The speed of this wave is  2.2 × 10^8 m/s. Calculate the frequency of the wave. Give your answer in standard form and to 2 significant figures."

The infrared wave is the part of the electromagnetic spectrum that comes right before visible light (when ordered from low to high frequencies). It is a transve...

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Explain the difference between a real and a virtual image.

In terms of definitions, we can differentiate the two types of images as follows: a real image is one that can be projected and captured on a screen; on the oth...

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What is the law of conservation of energy?

The law of conservation of energy is one of the four exact conservation laws that govern the way the universe works (the other three being linear momentum, angu...

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