Question

(1)
(3)
24.
अपरिवर्तित रहता है (Unchanged)
गैस में (Gas)
(2) द्रव म (Liquia )
(4)
तीनों में समान (Same in three)
ताप बढ़ने पर ध्वनि का वेग (With the increase of temperature, the speed of sound):
बढ़ता है (increases)
(2) घटता है (decreases)
(3)
20 Hz से कम आवृति के ध्वनि को कहते हैं -
(4) इनमें से कोई नहीं (None of these
The sound of frequency less than 20 Hz is called -
(1)
(2) अवश्रव्य ध्वनि (Infrasonicsour
(3)
(4) इनमें से कोई नहीं (None of the
25.
पराश्रव्य ध्वनि (Ultrasonic sound)
Stan safi (audible sound)​

Answer 1

Answer:

hindi or english

Explanation:

Lal Bal Pal were a triumvirate of assertive nationalists in British India in the early 20th century, from 1906 to 1918. They advocated the Swadeshi movement involving the boycott of all imported items and the use of Indian-made goods in 1907 during the anti-Partition agitation in Bengal which began in 1905. Wikipedia