Suppose your professor handed you a test tube with 3 ml of an e. coli culture in it and told you to make a 10-3 dilution of the entire culture volume with water. what would your final volume (v2) of the dilution need to be in order to get this dilution? hints: use v1d1 =v2d2 and remember to use the d1 of a stock (undiluted sample)

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

inverse v=i*r

nice nice