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Xenotransplantation [UPSC Science & Technology]

In January 2022, in a medical first, doctors transplanted a pig heart into a patient to save his life in the US. The patient was deemed... View Article

Difference between Artificial Intelligence and Machine Learning

Artificial Intelligence and Machine Learning are the famous terminologies belonging to the computer science family. In this article we will... View Article

Difference between Array and Linked List

An array is a grouping of data elements or data items stored in contiguous memory. An array is one of the most simple data structures where we... View Article

Difference between Oracle and MySQL

Both oracle and mysql are important terms belonging to the database family. Let’s find out some major differences between oracle and mysql.... View Article

Differences between Checked and Unchecked Exceptions in Java

An exception in Java is a spontaneous event that occurs during the runtime that can interrupt the regular flow of the program. There are two... View Article

Difference between Vacation and Holiday | Holiday vs Vacation

You might have heard about the terms ‘holiday’ and ‘vacation’, and some of you might have assumed that both these words mean the same. This kind... View Article

Difference between Assure and Ensure | Assure vs Ensure

Though these two words might look similar, they are not. There are plenty of pairs of words present in the English Language that might often... View Article

Difference between Anybody and Anyone | Anybody vs Anyone

You might have heard people using the words ‘anybody’ and ‘anyone’ quite often and might have wondered whether these words are similar or not.... View Article

Difference between Under and Beneath | Under vs Beneath

The words ‘under’ and ‘beneath’ are often used interchangeably, but while doing so, most people don’t know whether they have different meanings... View Article

Difference between Test and Experiment

You might have often heard the words ‘test’ and ‘experiment’ and wondered if they have the same meanings or not. The aim of this article is to... View Article

Difference between Test and Exam | Test vs Exam

All of us have heard our teachers or parents using the terms ‘test’ and ‘exam’ very frequently. Have you ever thought what the difference between... View Article

Difference between Alone and Lonely | Lonely vs Alone

Most people often joke about English being a funny language. The reason is that there are many words that people, irrespective of their expertise... View Article

Difference between Lift and Elevator | Lift vs Elevator

There are some terms in the English Language that people often get confused with. While using these in sentences, students or adults both often... View Article

A cylindrical tube open at both ends has a fundamental frequency f in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now

a) f/2 b) f c) 3f/4 d) 2f Answer: b) f Solution: Case 1: λ/2 = l ⇒ λ = 2l f = v/λ = v/2l Case... View Article

Two waves are represented by, y₁ = A sin (kx – ωt) and y₂ = A cos (kx – ωt)

The amplitude of the resultant wave is 1) 4A 2) 2A 3) √2 A 4) A Answer: 3) √2 A Solution: y1 = A sin... View Article

Two points on a travelling wave having frequency 500 Hz and velocity 300 ms^-1 are 60⁰ out of phase, then the minimum distance between the two points is

a) 0.2 b) 0.1 c) 0.5 d) 0.4 Answer: b) 0.1 Solution: As, v=nλ Therefore, λ=v/n=300/500=3/5m phase difference... View Article

The equation of a progressive wave can be given by y =15sin (660πt – 0.02πx). The frequency of the wave is

a) 330 Hz b) 342 Hz c) 365 Hz d) 660 Hz Answer: a) 330 Hz Solution: y=15sin(660πt−0.02πx) The general... View Article

A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s

a) 12 b) 8 c) 6 d) 4 Answer: c) 6 In fundamental mode λ/4=0.85 λ=4×0.85 f =... View Article

Some of the frequencies of tones produced by an organ pipe are 220, 440, 550, 660 Hz. Find the effective length of the pipe. (take, the speed of sound in air = 330 m/s)

a) 1.8 m b) 1.7 m c) 1.5 m d) 1.2 m Answer: c) 1.5 m Solution: Frequencies of tones produced by an organ pipe are 220,... View Article

Two trains, each moving with a velocity of 30 ms^-1, cross each other. One of the trains gives a whistle whose frequency is 600 Hz. If the speed of sound is 330 ms^-1, the apparent frequency for passengers sitting in the other train before crossing would be

a) 600 Hz b) 630 Hz c) 920 Hz d) 720 Hz Answer: d) 720 Hz Solution: When both trains are moving towards each other then,... View Article

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