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- The displacement of a particle in SHM is \(x=5\sin\left(\pi t+\frac{\pi}{3}\right)\) cm. Its maximum speed is Answer: B. 5π cm/s v_max=Aω=5×π=5π cm/s. 1
- A mass attached to a spring oscillates with period \(T\). The spring is cut into two equal halves and the same mass is attached to one half. The new period is Answer: D. T/sqrt2 Half spring has k'=2k . T∝1/sqrt k⇒ T'=T/sqrt2 . 1
- The fundamental frequency of a pipe closed at one end is 250 Hz. The frequency of its first overtone is Answer: D. 750 Hz A closed pipe has only odd harmonics; first overtone =3n=750 Hz. 1
- A tuning fork of frequency 256 Hz produces 4 beats/s with an unknown fork. When the unknown fork is loaded with a little wax (which lowers its frequency), the number of beats becomes 6 per second. The original frequency of the unknown fork is Answer: A. 252 Hz Unknown is 252 or 260 Hz. Loading lowers frequency; beats increase only if it was already below 256, so it is 252 Hz. 1
- A string 1 m long, fixed at both ends, carries transverse waves with speed 200 m/s. The frequency of its second overtone is Answer: A. 300 Hz Fundamental =v/2L=100 Hz; second overtone = third harmonic =300 Hz. 1
- What will bethesame of magnesium chloride?
- Note on Kingdom classification. Classification of kingdoms is a fundamental part of biological taxonomy, which aims to organize and categorize living organisms based on the... 1
- Who is Johannes kepler? Johannes Kepler (1571-1630) was a German astronomer and mathematician. He started working as a helper to the famous astronomer Tycho Brahe i... 1
- Who is Sir Isaac Newton? Great Scientists: Sir Isaac Newton (1642-1727) was one of the greatest scientists of recent times. He was born in England. He gave his laws... 1
- What is Kepler`s three law? Kepler's first law the orbit of a planet is an ellipse with the sun at one of the foci. Kepler's second law the line joining the planet and... 2
- What is gravitational force? Gravitational force is a fundamental force of nature that exists between any two objects with mass. It is the force that attracts objects to... 1
- What is a centripetal force? A force acts on any object moving along a circle and it is directed towards the centre of the circle. This is called the Centripetal force. 1
- What is escape velocity? The minimum initial velocity needed by an object projected upwards to overcome earth's gravitational force and not fall back on earth is cal... 1
- What is free fall?and how it happens? Whenever an object moves under the influence of the force of gravity alone, it is said to be in Free Fall. During free fall initial velocity... 1
- What is the transcription and translation process? Transcription: The genetic information stored in DNA is transcribed into RNA in a process known as transcription. RNA polymerase, an enzyme,... 1
- Short note on central dogma? The central dogma is a fundamental principle in molecular biology that describes the flow of genetic information within a cell. It explains... 1
- What is the difference between mass and weight of an object . Mass is a fundamental property of an object that represents the amount of matter it contains. It is an intrinsic property and remains consta... 2
- study the entries in the following table and rewrite them putting the corrected items in a single row :gravitation 1 2 3 mass N measure of inertia weight kg zero at the center acceleration due to gravity m/s² depends on height gravitational constant Nm²/k... 2
- What is the speed of light divided by mass? The speed of light divided by mass does not have a specific physical meaning or a commonly used unit in physics. It is not a meaningful quan... 1
- Learn Trigonometry in easy way Watch this video std 10th
- Activity Prepare a temporary mount of one drop of pond water on a glass slide. here are the instructions for preparing a temporary mount of pond water on a glass slide and observing it under a microscope, written in the... 1
- Activity Take a small drop of curd or buttermilk on a clean glass slide. Dilute it with a little water. here are the steps for the activity: Materials needed: Glass slide Cover slip Curd or buttermilk Water Dropper Compound microscope Steps: Ta... 2
- Characteristics of Protozoa. Protozoa are unicellular, eukaryotic organisms belonging to kingdom, Protista. They are microscopic of the size of about 200 pm. They have d... 1
- Characteristics of Bacteria. Bacteria are microscopic, unicellular, prokaryotic organisms belonging to the kingdom Monera. Some bacteria are solitary with independent ex... 1