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11 months agoContributor-Level 10
(a) For the stationary observer:
Frequency of the sound produced by the whistle, = 400 Hz
Speed of sound = 340 m/s
Velocity of wind, v = 10 m/s
As there is no relative motion between the source and the observer, the frequency of the sound heard by the observer will be the same as that produced by the source, i.e. 400 Hz. The wind is blowing towards the observer. Hence, the effective speed of the sound increases by 10 units, i.e.
Effective speed of the sound, = 340 + 10 = 350 m/s
The wavelength ( heard by the observer is given by the relation:
= = 0.875 m
(b) For the running Observer:
,&nb
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11 months ago
Contributor-Level 10
Lingaya's Vidyapeeth has released the placement report for the Class of 2025. The key highlights of are tabulated below:
Particulars | Placement Statistics (2025) |
|---|---|
Highest package | INR 15 LPA |
Total students | 11,00 |
Students placed | 650 |
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11 months agoContributor-Level 7
No, it is not mandatory to update or provide all GATE scores during the COAP registration. Candidates must choose their best valid GATE scores to secure a seat in the participating colleges. The COAP registrations has started and the last date to register for Round I is May 20 (9:00 am). Candidates must visit the website to complete the registration as soon as possible. The GATE COAP Round II registration is scheduled from May 23 to May 26.
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11 months agoGuide-Level 15
Greater Noida Institute of Technology IPU offers admission to courses based on the entrance exam scores of the candidates. The institute accepts JEE Main score for admission to BTech programme. The institute also offers admission through Management Quota. The institute provides admission to candidates taking admission under the Management Quota based on JEE Main score.
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11 months agoContributor-Level 10
Frequency of the whistle, = 400 Hz
Speed of the train, = 10 m/s
Speed of sound, v = 340 m/s
The apparent frequency (f’) of the whistle as the train approaches the platform is given by the relation:
f’ = ( = ( 412.12 Hz
The apparent frequency (f”) of the whistle as the train recedes from the platform is given by the relation:
f” = ( = ( 388.57 Hz
The apparent change in the frequency of sound is caused by the relative motions of the source and the observer. These relative motions produce no effect on the speed of sound.
Therefore, the speed of sound in ai
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11 months agoContributor-Level 7
Hotel Management offers significant room for innovation and creativity, and this is becoming increasingly valued by top recruiters.
- Hotels are finding new ways to enhance guest experiences.
- Innovation in Culinary Arts, Room Design & Guest Experience, Event Planning & Banqueting, Digital Marketing & Branding, and Front Office & Customer Relations, areas are always in demand.
- With increasing environmental awareness, hotels are looking for innovative ways to be sustainable.
- Implementing new technologies to improve efficiency and guest satisfaction.
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11 months agoContributor-Level 10
(a) A node is a point where the amplitude of vibration is the minimum and the pressure is maximum. On the other hand, an antinode is a point where the amplitude of vibration is maximum and the pressure is minimum. Therefore, a displacement node is nothing but a pressure antinode and vice versa.
(b) Bats emit very high-frequency ultrasonic sound waves. These waves get reflected back toward them by obstacles. A bat receives a reflected wave (frequency) and estimates the distance, direction, nature and size of the obstacle with the help of its brain senses.
(c) The overtone produced by a sitar and a violin, and the strengths
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11 months agoNew Question
11 months agoBeginner-Level 5
There are botany offical cutoff released by college but in most colleges it is 50% to 60% is the eligibility criteria.
Hope for best
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11 months agoContributor-Level 10
Frequency of string A, = 324 Hz, let the frequency of string B, be =
Beat’s frequency, n = 6 Hz
Beat’s frequency is given as n = or 6 = 324
Frequency decreases with a decrease in the tension in a string. This is because frequency is directly proportional to the square root of tension, . It is given as
Hence the beat frequency cannot be 330 Hz. So
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11 months agoContributor-Level 10
The NID B.Des Provisional Letter for B.Des programme will be released on June 10, 2025. Provisional Offer Letters for B.Des Admissions 2025 will be issued to candidates who have paid the non-refundable token fee and whose uploaded documents have been successfully verified and found to be in order.
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11 months agoContributor-Level 10
Length of the pipe, l = 20 cm = 0.2 m
Source frequency = normal mode frequency is given by the relation
= (2n-1) , n is an integer = 0,1,2,3, ….
430 = (2n-1)
n = 1
Hence, the first mode of vibration frequency is resonantly excited by the given source. In a pipe open at both ends, the mode of vibration frequency is given by the relation:
, n = = = 0.5
Since the number of the node of vibration (n) has to be an integer, the given source does not produce a resound vibration in an open pipe.
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11 months agoContributor-Level 10
Yes, PTSNS University BA students can apply for scholarship schemes. The scholarships are provided through the Madhya Pradesh scholarship portal. Additionally, the MP scholarship portal awards scholarships to meritorious students through the following schemes:
- Gaon Ki Beti Yojna
- Mukhya Mantri Medhavi Vidyarthi
- Mukhya Mantri Jankalyan (Shiksha Protsahan Yojna)
- Post Matric Scholarship Scheme (OBC, SC, ST Students)
- Awas Sahayta Yojana (SC, ST Students)
- Pratibha Kiran Scholarship Yojna
- Vikramaditya Scholarship Yojna
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11 months ago
Contributor-Level 10
Yes, Lingaya's Vidyapeeth conducts annual on campus placement drives for courses like BTech, BBA, BCA, BPharma and more. Here are the highlights:
Particulars | Placement Statistics (2024) | Placement Statistics (2025) |
|---|---|---|
Highest package | INR 8 LPA | INR 15 LPA |
Total students | 1,020 | 11,00 |
Students placed | 564 | 650 |
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11 months agoContributor-Level 10
Length of the steel rod, l = 100 cm = 1 m
Fundamental frequency of vibration, = 2.53 kHz = 2.53 Hz
When the rod is plucked at its middle, an antinode (A) is formed at the centre, and the nodes (N) are formed at its two ends, as shown in the figure.

The distance between two successive nodes is
l = = 2l = 2 m
The speed of sound in steel is given by the relation
v = = 2.53 = 5.06 m/s = 5.06 km/s
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11 months agoContributor-Level 10
Frequency of the tuning fork, = 340 Hz
Since the given pipe is attached with a piston at one end, it will behave as a pipe with one end closed and the other end open, as shown in this figure.

= of the pipe = 25.5 cm = 0.255 m
= 4 m = 1.02 m
The speed of sound is given by the relation, v = = 340 = 346.8 m/s
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11 months agoContributor-Level 10
Mass of the wire, m = 3.5 kg
Linear mass density, = 4 kg/m
Frequency of vibration, = 45 Hz
Length of the wire, l = = = 0.875 m
The wavelength of the stationary wave = , where n = number of nodes in the wire
For fundamental node, n = 1, = 2l = 2
(a) The speed of the transverse wave in the string is given as v = = 45 = 78.75 m/s
(b) The tension produced in the string is given by the relation, T = = 4 = 248.06 N
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11 months agoContributor-Level 10
Yes, a candiate can change his/her college preference multiple times before the deadline (May 19, 2025, 5 PM). After the deadline, the last college selected will be considered final.
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11 months agoContributor-Level 10
Yes, SK University does offer BTech courses to its Class 12 passed-out students. This full-time programme is available in various specialisations, such as Mechanical Engineering, Computer Engineering, Civil Engineering, Electrical Engineering, Computer Science and Engineering, etc. For more details, candidates can refer to the following key highlights:
| Particular | Highlights |
|---|---|
Duration | Four years |
Course Level | UG level |
Mode of Course | Full Time |
Seat breakup | 420 |
Total semesters | Eight |
Selection Criteria | Entrance-based |
Note: The above mentioned seat intake has been sourced from the official website. It is still subject to change and, hence, is indicative.
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11 months agoContributor-Level 10
(a) The given equation represents a stationary wave because the harmonic terms kx and appear separately in the equation.
(b) The given equation does not contain any harmonic term. Therefore, it does not represent either a travelling wave or a stationary wave.
(c) The given equation represents a travelling wave as the harmonic terms kx and are in the combination of kx – .
(d) The given equation represents a stationary wave because the harmonic terms kx and in the equation. This equation represents the superposition of two stationary waves.
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