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New Question

11 months ago

0 Follower 5 Views

V
Vishal Baghel

Contributor-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, ve = 340 + 10 = 350 m/s

The wavelength ( λ)ofthesound heard by the observer is given by the relation:

λ=veν = 350400 = 0.875 m

 

(b) For the running Observer:

Velocityoftheobserver ,&nb

...more

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11 months ago

0 Follower 4 Views

Shiksha Ask & Answer
Shoaib Mehdi

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

New Question

11 months ago

0 Follower 12 Views

P
Piyush Shukla

Contributor-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. 

New Question

11 months ago

0 Follower 2 Views

N
Nishtha Shukla

Guide-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. 

New Question

11 months ago

0 Follower 6 Views

V
Vishal Baghel

Contributor-Level 10

Frequency of the whistle,  ν = 400 Hz

Speed of the train,  vr = 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’ = ( vv-vr)ν = ( 340340-10)×400= 412.12 Hz

The apparent frequency (f”) of the whistle as the train recedes from the platform is given by the relation:

f” = ( vv+vr)ν = ( 340340+10)×400= 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

...more

New Question

11 months ago

0 Follower 3 Views

M
Mani Shukla

Contributor-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.

New Question

11 months ago

0 Follower 30 Views

V
Vishal Baghel

Contributor-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 ago

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New Question

11 months ago

0 Follower 6 Views

N
Nitin Kumar

Beginner-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

New Question

11 months ago

0 Follower 5 Views

V
Vishal Baghel

Contributor-Level 10

Frequency of string A, fA = 324 Hz, let the frequency of string B, be = fB

Beat’s frequency, n = 6 Hz

Beat’s frequency is given as n = fA±fB or 6 = 324 ±fB

fB=318Hzor330Hz

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

νT

Hence the beat frequency cannot be 330 Hz. So fB=318Hz

New Question

11 months ago

0 Follower 11 Views

S
Sayeba Naushad

Contributor-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.

 

New Question

11 months ago

0 Follower 8 Views

V
Vishal Baghel

Contributor-Level 10

Length of the pipe, l = 20 cm = 0.2 m

Source frequency = nth normal mode frequency is given by the relation

νn = (2n-1) ν4l , n is an integer = 0,1,2,3, ….

430 = (2n-1) ×3404×0.2

n = 1

Hence, the first mode of vibration frequency is resonantly excited by the given source. In a pipe open at both ends, the nth mode of vibration frequency is given by the relation:

νn=nv2l , n = 2lνnv = 2×0.2×430340 = 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.

New Question

11 months ago

0 Follower 14 Views

R
Ranjeeta Karan

Contributor-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

New Question

11 months ago

0 Follower 5 Views

Shiksha Ask & Answer
Shoaib Mehdi

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

New Question

11 months ago

0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

Length of the steel rod, l = 100 cm = 1 m

Fundamental frequency of vibration,  ν = 2.53 kHz = 2.53 ×103 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 λ /2

l = λ/2 λ = 2l = 2 m

The speed of sound in steel is given by the relation

v = νλ = 2.53 ×103×2 = 5.06 ×103 m/s = 5.06 km/s

New Question

11 months ago

0 Follower 12 Views

V
Vishal Baghel

Contributor-Level 10

Frequency of the tuning fork,  ν = 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.

l1 = λ4, wherelength of the pipe l1 = 25.5 cm = 0.255 m

λ=4l1 = 4 ×0.255 m = 1.02 m

The speed of sound is given by the relation, v = νλ = 340 ×1.02 = 346.8 m/s

New Question

11 months ago

0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

Mass of the wire, m = 3.5 ×10-2 kg

Linear mass density,  μ=ml = 4 ×10-2 kg/m

Frequency of vibration,  ν = 45 Hz

Length of the wire, l = mμ = 3.5×10-24×10-2 = 0.875 m

The wavelength of the stationary wave λ = 2ln , where n = number of nodes in the wire

For fundamental node, n = 1,  λ = 2l = 2 ×0.875=1.75m

(a) The speed of the transverse wave in the string is given as v = νλ = 45 ×1.75 = 78.75 m/s

 

(b) The tension produced in the string is given by the relation, T = v2μ =  (78.75)2 × 4 ×10-2 = 248.06 N

New Question

11 months ago

0 Follower 6 Views

S
Sayeba Naushad

Contributor-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.

New Question

11 months ago

0 Follower 3 Views

N
Nishtha Garg

Contributor-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:

ParticularHighlights

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.

New Question

11 months ago

0 Follower 5 Views

V
Vishal Baghel

Contributor-Level 10

(a) The given equation represents a stationary wave because the harmonic terms kx and ωt 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 ωt are in the combination of kx – ωt .

 

(d) The given equation represents a stationary wave because the harmonic terms kx and ωtapearseparately in the equation. This equation represents the superposition of two stationary waves.

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