A ball of mass 10 g is moving with a velocity of 50 m −1 . On applying a constant force on ball for 2.0 s, it acquires a velocity of 70 m −1 . Calculate : (i) the initial momentum of ball, (ii) the final momentum of ball, (iii) the rate of change of momentum, (iv) the acceleration of ball, and

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

thermal energy is the answer