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Assertion : When a beetle moves along the sand within a few tens of centimeters of a sand scorpion,
asked
Apr 4, 2019
in
JEE
by
kratos
irodov
waves
acoustics
momentum
class-11
jee
class-10
laws of conservation of energy
jee mains
kingdom animalia
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1
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Solids have more ordered structure than gases. Why?
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Apr 1, 2019
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JEE
by
kratos
acoustics
class-11
jee
class-7
icse
class-10
jee mains
gaseous state
heat
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What is meant by RADAR and SONAR? How are long distances measured using these techniques?
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Mar 26, 2019
in
Class 11
by
kratos
waves
acoustics
class-11
class-10
units and measurements
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With which of the following frequencies does a tuning fork of 256 Hz resonate ?
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Mar 21, 2019
in
Class 12
by
kratos
waves
neet
sound
acoustics
vibration of sound
class-11
aiims
class-10
icse
echoes
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1
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A train moving with a velocity of 60 miles/hr blows a whistle with frequency 516 Hz. Find the note heard by a passenger in another train approaching
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Mar 21, 2019
in
Class 11
by
kratos
waves
acoustics
oscillations
class-11
class-10
+3
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1
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If the splash is heard 4.23 seconds after a stone is dropped into a well. 78.4 metes deep,
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Mar 20, 2019
in
JEE
by
kratos
sound
acoustics
cbse
jee
class-9
class-10
jee mains
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1
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What are Longitudinal waves and Transverse waves?
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Mar 16, 2019
in
Class 11
by
kratos
waves
acoustics
oscillations
class-11
class-10
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1
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The velocity of sound in air at N.T.P is 331 ms^-1. Find its velocity when the temperature rises to 91 °C and its pressure is doubled.
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Mar 16, 2019
in
Class 11
by
kratos
waves
acoustics
cubes and cube roots
class-8
oscillations
class-11
class-10
+3
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1
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An ultrasonic wave is sent from a towards the bottom of the sea.it is found that the time
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Mar 7, 2019
in
Class 11
by
kratos
waves
sound
acoustics
class-11
class-10
icse
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1
answer
What is Doppler'* effect in light ? Define red shift and blue shift in it.
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Mar 6, 2019
in
Class 12
by
kratos
waves
neet
acoustics
oscillations
class-11
aiims
wave motion
class-10
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1
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A stone is dropped into a well in which water is 78.4 m deep. After how long will the sound of splash be heard at the top?
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Mar 5, 2019
in
Class 10
by
kratos
sound
acoustics
cbse
class-9
class-10
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vote
1
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The apparent frequency of a note when listener moves towards a stationary source with velocity 40 m/* is 200 Hz.
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Mar 1, 2019
in
JEE
by
kratos
acoustics
jee
class-10
simple harmonic motion
jee mains
gravitation
heat
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1
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A fork of frequency 250 Hz is held over and maximum sound is obtained when the column of air is 31 cm or 97 cm.
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Feb 25, 2019
in
Class 11
by
kratos
sound
acoustics
vibration of sound
class-11
class-10
icse
echoes
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vote
1
answer
Bats detect obstacles in their path by receiving the reflected A. Infrasonic waves B. Ultrasonic waves
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Feb 16, 2019
in
Class 10
by
kratos
nda
(b) infrasonic waves
sound
acoustics
class-10
icse
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1
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Now we use a tuning fork of frequency 302 Hz, instead of 300 Hz, with how much velocity should we move the tuning fork,
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Feb 16, 2019
in
JEE
by
kratos
class-11
jee mains
class-10
jee main
jee
doppler effect
sound waves
acoustics
jee main 2021
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1
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Waves produced in water are : (a) Longitudinal waves (b) Transverse waves
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Feb 13, 2019
in
Class 11
by
kratos
waves
acoustics
oscillations
class-11
class-10
+3
votes
1
answer
A tuning fork is set into vibration in air. Name the kind of vibrations it executes.
asked
Feb 11, 2019
in
JEE
by
kratos
waves and optics
sound
acoustics
class-8
class-11
jee
oscillations and wave
class-10
jee mains
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Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440ms^-1 in a given medium.
asked
Feb 7, 2019
in
Class 10
by
kratos
sound
acoustics
cbse
class-8
class-9
class-10
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1
answer
Show that 527 + 752 + 275 is exactly divisible by 14.
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Feb 7, 2019
in
Class 10
by
kratos
playing with numbers
acoustics
class-8
class-10
icse
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1
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Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires.
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Feb 2, 2019
in
Class 12
by
kratos
neet
acoustics
csat
electric current
jee
time and distance
class-10
jee mains
class-12
current electricity
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