Determine the wavelength for a wave that has a frequency of 4 hz and a wave speed of 2 m/s

The wavelength of a wave of frequency 4 Hz and speed 2 m/s is 0.5 m.

Explanation:

As we know that speed of a wave is directly proportional to the product of wavelength and frequency of the wave. If any two variables are known, then we can easily find the third parameter.

Like, in this case, the wavelength is not given, instead the frequency is given as 4 Hz and speed is given as 2 m/s, so the wavelength can be easily determined.

Speed = Wavelength × Frequency

Then Wavelength = speed/frequency

So, wavelength = 2/4=0.5 m

Thus, the wavelength of a wave of frequency 4 Hz and speed 2 m/s is 0.5 m.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards