Three force vectors act on a free body at the origin as shown. Place your answers in the boxes rovided. F1 = 3 <3.0 , 1.2 > N
F2 = 4.0 1 -3.2jN
F3 = 6.2 N at 45° relative to the positive x-axis
a) Report the unit vector in the direction of F3 (in unit vector or i, j,k notation to 4 significant figures).
b) Calculate the resultant force R, which is the sum of the three forces, F1, F2 and F3 (in unit vector notation or i, j,k notation to 4 significant figures.).

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

On average 8 bananas make up one pound. the price is four pounds for 5.00. you must buy 25 bananas.what is your cost?

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.