What is the wavelength of a wave with a frequency of 262 hz and a speed of 343 m/s A. 89,8666 m/s
B. 0.76 m
C. 1.11 x 10^ -5 m
D. 1.3 m

Heya!!

For calculate wavelength, lets applicate formula:

                                                   Δ   Being   Δ

                                            f = Frequency = 262 Hz

                                            v = Velocity = 343 m/s

                                              = Wavelenght = ?

⇒ Let's replace according the formula:

⇒ Resolving

Result:

The wavelength is 1,3 meters.

Good Luck!!

true tan speed = ang vel x radius

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