امتحان لايف Phy (12Dec) | مراجعة ماسبق دراسته

The relationship between four physical quantities is given by the equation P = Q – RS. Given that the equation is homogeneous, which of the following statements must be correct?

How many bottles of volume 1000 cm³ are needed to fill a tank of volume 1 m³ ?

Which of the following lengths is the smallest :

a) 12 m

b) 0.07 km

c) 2.7 × 10⁴ mm

d) 7.2 × 10-9 Gm

e) 12 × 10⁷ μm

Two physical quantities, ?and ?,have the dimensional formula ??^-1.The physical quantity ? has the dimensional formula ?? ^-2.According to the equation ?=(?−?)/?,what is the dimensional formula for the physical quantity ??

a) ??^-1      

b) ?^-2??       

c) ?0?0T

d) ?⁰?^-2?     

If the equation (d = xv + 1/2 a y²) describes the motion of a body, where (d) has the dimensional formula of the length, (v) has the dimensional formula of the velocity and (a) has the dimensional of the acceleration. the dimensions of both x and y.

a) T²,T

b) T, T2

c) LT,LT²

d) LT²,LT

If A = 3/2 B^m Cⁿ and the dimensions of quantities A, B and C are  L T², L T^-1 and L T² the values of m and n.

Consider the four quantities : ?,?,?, and ?, where [?]=? ? ²? ,  [?]=? ^-1?^-3 ,and [?]=? ²? ^-1.The compound quantity ???? is dimensionless. What are the dimensions of ??   

a) ?²?-1    

b) ?^-2??      

c) ??

d) ?⁰?^-2?

Which of the following different physical quantities more accurate :

Which of the following sentences a derived vector quantity? …..

a) The temperature of a body is 37^o C

b) The displacement of a body moving to west is 50 m

c) A body moving to east by velocity 2 m/s

d) The mass of a body is 10 kg

In the following figure

What is displacement and distance at time t = 3.0 s?

What is the average velocity during the time interval between 0.0 s and 4.0 s?

A ball rolled on a surface when it had been pushed, then it slowed down and stopped. Did the ball velocity and acceleration have

The opposite figure represents ( velocity – time ) graph:

the acceleration of the moving body from A to B and from C to D