A.12x2=7x+1 B.12x2=7x-1 C.12x2=x+1 D.12x2=x-1 E.12x2=1-x
1The nuclear force is a ……. range force.
(20) The ratio of mass to volume is defined as ……… .
(21) The density of ice is ……….. than that of water.
(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 ………. .
- If a:b=3:8 and b:c=4:5, then a:c=…………..
A. 5:11 B. 3:8 C. 3:11 D. 3:10 E. 5:8 - If a:b=3:5 and b:c=3:5, then a:b:c=………
A. 2:3:5 B.3:5:7 C.6:10:15 D. 9:15:25 E.9:20:27 - If a:b = 5:3 , then 3a+ 4b: 4a+3b is
A. 27:36 B. 29:27 C. 27:29 D. 26:29 E. 17:19