You accidentally dropped a 3.5 kg glass platter. Before it hit the floor, the motion was entirely

in the vertical direction. When it hit the floor,

it broke into three pieces and they all moved

out in the plane of the floor. Imagine a coor-

dinate system on the floor. Piece 1 had a

mass of 1.3 kg and it moved off with a velocity

of 1.8 m/s at an angle of 52˚ counterclockwise

from the positive x axis. Piece 2 with a mass

of 1.2 kg moved off with a velocity of 2.5 m/s

at an angle of 61˚ clockwise from the negative

x axis. Find the mass and the velocity of

piece 3.

area of focus

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =

a. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.