Related Questions

Which one of the following animals can hear ultrasonic sound ?
A Rat
B Squirrel
C Cat
D Bat
What is the range of frequencies of sound waves audible to human beings?
A 16kHz to 200kHz
B 16Hz to 16kHz
C 16Hz to 20kHz
D 14Hz to 20kHz
দুটি সুসঙ্গত উৎস থেকে λ দৈর্ঘ্যের দুটি তরঙ্গ সমদশায় বের হয় । একটি বিন্দুতে যেখানে তরঙ্গ দুটি মিলিত হয় সেখানে তাদের দশা পার্থক্য 90° । তরঙ্গ দুটির অতিক্রান্ত পথ পার্থক্য তখন কত ? ( Two coherent sources emit waves of wavelength λ which are in phase. which are in phase. The two waves meet at a point where they have a phase difference of 90°. Which of the following could be the traversed path difference between the waves?)
A 2λ
B λ
C λ/2
D λ/4
Sound waves are ------ waves.
A transverse
B Electromagnetic
C Longitudinal
D one of these
Which of the following statements is correct about sound waves and light waves?
A Both transverse waves
B Both longitudinal waves
C Sound waves are transverse waves and light waves are longitudinal waves
D Sound waves are longitudinal and light waves are transverse waves
Ultrasonic waves are used for stirring liquid solutions because they
A do not produce noise during the operation
B are easy to produce
C can produce perfectly homogeneous solutions
D do not produce chemical reactions in the solution
Identify the sentence (s) in which the word mean the following sentence(s) would express her/his idea implies wealth or resources. (1) Do not try to live beyond your means. (2) Television is an effective means of communication. (3) Do not try to live beyond your means.
A (1)
B (3)
C (1) and (3)
D (2)
do not hear the sound of sea as they are accustomed to it.
A We can feel, smell and taste unlike the deep sea creatures.
B We are unfortunate because we cannot experience winter and summer.
C We can see the ground beneath our feet and the depth of the ocean.
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
sounds waves are -- waves
A transverse
B Electromagnetic
C Longitudinal
D none of these

Next steps