Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
2.4k views
in Physics by (64.1k points)

An engine blowing a whistle of frequency 128 Hz moves with a velocity of 72 km/hr towards a hill from which a well defined echo is heard. Calculate the frequency of the echo heard by the driver. The velocity of sound in air is 330 m/s. 

1 Answer

+1 vote
by (61.3k points)
selected by
 
Best answer

us = + 72 km/hr = + 20m/s,

u0 = -72 km/hr = -20 m/s, v = 330 m/s

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...