Assume you have a wireless application you would like to desıgn, build, and sell as a commercial product. you have selected a target frequency in the uhf range how would you decide what frequency to use, and how would you get permıssion to use it?

answer: i don't know the answer good luck

explanation:

d) physical means can be used to separate the components of air.

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

a skateboard rolling across the street - apex