Physics, 06.10.2019 03:30 kandrews6221

Suppose a sound wave and a light wave have the same frequency. which of the following is true? 1. the light wave has a longer wavelength and has the greater speed. 2. the sound wave has a shorter wavelength and has the greater speed. 3. the sound wave has a longer wavelength and has the greater speed. 4. the sound wave has a longer wavelength and has the slower speed. 5. the light wave has a shorter wavelength and has the greater speed. 6. the light wave has a longer wavelength and has the slower speed. 7. the light wave has a shorter wavelength and has the slower speed

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Answer from: katlyn10289

answer: the answer would be 5: the light's wavelength is smaller but it travels at a faster speed.

explanation: light rays travel at an immensely fast speed, astronomically so to where sound is not relative to it in speed. however, sound waves are slower but its wavelength varies between 1 centimetre and 10 metres and can diffract through round corners. light is much smaller, only being able to diffract through small holes.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

Indoraptor for sure

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Suppose a sound wave and a light wave have the same frequency. which of the following is true? 1. t...