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Physics-

General

Easy

Question

If sound wave travel from air to water, which of the following remain unchanged?

Velocity
Wavelength
Frequency
Intensity

The correct answer is: Frequency

Frequency is that characteristic of sound waves which does not change while passing through boundary separating two media.

Related Questions to study

. It takes 2.0 s for a sound wave to travel between two fixed points when the day temperature is 10°C. if the temperature rises to 30^°C the sound wave travels between the same fixed parts in

. It takes 2.0 s for a sound wave to travel between two fixed points when the day temperature is 10°C. if the temperature rises to 30^°C the sound wave travels between the same fixed parts in

Physics-General

Let $f left parenthesis x right parenthesis equals stack l i m with n rightwards arrow infinity below left square bracket fraction numerator n to the power of n left parenthesis x plus n right parenthesis left parenthesis x plus n over 2 right parenthesis..... left parenthesis x plus n over n right parenthesis over denominator n factorial left parenthesis x squared plus n squared right parenthesis left parenthesis x squared plus n squared over 4 right parenthesis times left parenthesis x squared plus n squared over n squared right parenthesis end fraction right square bracket to the power of x divided by n end exponent$ , for all $x greater than 0$ Then

Let $f left parenthesis x right parenthesis equals stack l i m with n rightwards arrow infinity below left square bracket fraction numerator n to the power of n left parenthesis x plus n right parenthesis left parenthesis x plus n over 2 right parenthesis..... left parenthesis x plus n over n right parenthesis over denominator n factorial left parenthesis x squared plus n squared right parenthesis left parenthesis x squared plus n squared over 4 right parenthesis times left parenthesis x squared plus n squared over n squared right parenthesis end fraction right square bracket to the power of x divided by n end exponent$ , for all $x greater than 0$ Then

Let $f left parenthesis x right parenthesis equals left curly bracket to the power of x squared vertical line blank cos blank pi over chi vertical line end exponent right curly bracket 0 comma$ $x equals 0 x not equal to 0$ $chi element of R$ Then $f$ is

Let $f left parenthesis x right parenthesis equals left curly bracket to the power of x squared vertical line blank cos blank pi over chi vertical line end exponent right curly bracket 0 comma$ $x equals 0 x not equal to 0$ $chi element of R$ Then $f$ is

parallel

The ratio of speed of sound in nitrogen and helium gas at 300 K is

The ratio of speed of sound in nitrogen and helium gas at 300 K is

Physics-General

If $V subscript m end subscript$ is the velocity of sound in moist air, $V subscript d end subscript$ is the velocity of sound in dry air, under identical conditions of pressure and temperature

If $V subscript m end subscript$ is the velocity of sound in moist air, $V subscript d end subscript$ is the velocity of sound in dry air, under identical conditions of pressure and temperature

Physics-General

lf the function $f left parenthesis x right parenthesis equals left curly bracket fraction numerator square root of 2 plus blank c o s blank x end root minus 1 over denominator k comma left parenthesis pi minus x right parenthesis squared end fraction comma x not equal to pi right curly bracket$ is continuous at $x equals pi$ , then $k$ equals

lf the function $f left parenthesis x right parenthesis equals left curly bracket fraction numerator square root of 2 plus blank c o s blank x end root minus 1 over denominator k comma left parenthesis pi minus x right parenthesis squared end fraction comma x not equal to pi right curly bracket$ is continuous at $x equals pi$ , then $k$ equals

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If $capital delta$ (x) = $open vertical bar table row cell e to the power of x end cell cell s i n invisible function application 2 x end cell cell t a n invisible function application x squared end cell row cell invisible function application left parenthesis 1 plus x right parenthesis end cell cell c o s invisible function application x end cell cell s i n invisible function application x end cell row cell c o s invisible function application x squared end cell cell e to the power of x minus 1 end cell cell s i n invisible function application x squared end cell end table close vertical bar$ = A + Bx + Cx², then B is equal to

If $capital delta$ (x) = $open vertical bar table row cell e to the power of x end cell cell s i n invisible function application 2 x end cell cell t a n invisible function application x squared end cell row cell invisible function application left parenthesis 1 plus x right parenthesis end cell cell c o s invisible function application x end cell cell s i n invisible function application x end cell row cell c o s invisible function application x squared end cell cell e to the power of x minus 1 end cell cell s i n invisible function application x squared end cell end table close vertical bar$ = A + Bx + Cx², then B is equal to

If ax³ + bx² + cx + d = $open vertical bar table row cell x to the power of 2 end exponent end cell cell left parenthesis x minus 1 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell row cell left parenthesis x minus 1 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 3 right parenthesis to the power of 2 end exponent end cell row cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 3 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 4 right parenthesis to the power of 2 end exponent end cell end table close vertical bar$ , then

If ax³ + bx² + cx + d = $open vertical bar table row cell x to the power of 2 end exponent end cell cell left parenthesis x minus 1 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell row cell left parenthesis x minus 1 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 3 right parenthesis to the power of 2 end exponent end cell row cell left parenthesis x minus 2 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 3 right parenthesis to the power of 2 end exponent end cell cell left parenthesis x minus 4 right parenthesis to the power of 2 end exponent end cell end table close vertical bar$ , then

$integral fraction numerator sin invisible function application x over denominator left parenthesis a plus b c o s invisible function application x right parenthesis squared end fraction d x$

$integral fraction numerator sin invisible function application x over denominator left parenthesis a plus b c o s invisible function application x right parenthesis squared end fraction d x$

parallel

The instantaneous values of current and voltage in an ac circuit are $i equals 100 sin invisible function application 3 14 t a m p$ and $e equals 200 sin invisible function application left parenthesis 314 t plus pi divided by 3 right parenthesis V$ respectively. If the resistance is 1 $capital omega$ then the reactance of the circuit will be

The instantaneous values of current and voltage in an ac circuit are $i equals 100 sin invisible function application 3 14 t a m p$ and $e equals 200 sin invisible function application left parenthesis 314 t plus pi divided by 3 right parenthesis V$ respectively. If the resistance is 1 $capital omega$ then the reactance of the circuit will be

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An oxide coated filament is useful in vacuum tubes because essentially

An oxide coated filament is useful in vacuum tubes because essentially

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In an electron gun the control grid is given a negative potential relative to cathode in order to

In an electron gun the control grid is given a negative potential relative to cathode in order to

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In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is

In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is

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If A and B are identical bulbs which bulbs glows brighter

If A and B are identical bulbs which bulbs glows brighter

Physics-General

Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that
e = 75 sin (sin $omega$ t) volt, i = 1.5 sin ( $omega$ t + 45^o) amp then, the wrong statement is

Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that
e = 75 sin (sin $omega$ t) volt, i = 1.5 sin ( $omega$ t + 45^o) amp then, the wrong statement is

Physics-General

parallel

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