The acoustic field in a standing wave tube is given by aexp(ia-ikx)+bexp(iar tikx) where the incident wave has an amplitude of a=10 pa. the fluid in the tube is air and at the end of the tube there is an interface with a fluid that has a characteristic impedance of pc-560 rayls. what is the magnitude of the reflected wave b, and what is the difference in level between the reflected wave and the incident wave in db?

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

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