Physics, 04.01.2020 00:31 umadbro8404

How many vibrations per second are represented in a radio wave of 101.7 mhz. (1 mhz = 106hz)?

Answers: 2

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Answer from: delaneyjane1599

$n=101.7\times 10^6$

Explanation:

It is given that,

Frequency of the radio wave, $f=101.7\ MHz=101.7\times 10^6\ Hz$

We know that the number of vibrations per second is called frequency of an object. We need to find the number of vibrations per second. Clearly, the number of vibrations per second represented in a radio wave is $101.7\times 10^6$ . Hence, this is the required solution.

Answer from: Quest

answer; equivalent to a one(1) horsepower motor;

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.

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