7g maphyme

(22) The symbol of density is ρ and it is a …….. quantity.
(23) The SI unit for pressure is …….. .
(24) The total momentum of an …….. system is constant.
(25) The product of mass to velocity is ……… .
(26) The acceleration due to the gravitational force is called acceleration due to ……… .
(27) For free-fall motion, a body will fall onto the ground with constant ……… .
(28) At maximum height the final velocity is ……… .
(29) The moment of a force is a …….. quantity.
(30) The SI unit of the moment of force is ………. .
.12 B.48 C.192 D.256 E.512

1. If (5x-4y) = 4(2x-3y) , then x : y = ……….
   A. 3:8 B. 8:3 C. 12: 17 D. 6:-13 E. 13:18
2. If x:y = 2:3 , find (x2 + y2):(x2-y2).
   A. 2:5 B. 13:-5 C.6:13 D. 6:-13 E. (9:13)
   20.Let x,y,z be three unequal numbers . Which of the following is (are) equal to x:y:z?
   1.5x: 5y : 5z 2. x+1 : y+1 : z+1 3. x2 : y2 : z2
   A.1 only B. 2 only C. 1 and 2 only D. 2 and 3 only E. 1,2 and 3