physics sec 1 exam no 1

M L ^-1 T ^-2 is the dimensional formula of .......

• acceleration

• force

• work

• pressure

4 x 10 ^-3 micro meter = ...... meter

• 4 x 10 ^-6

• 4 x 10 ^-12

• 4 x 10 ^-9

• 4 x 10 ^-3

A student measure his mass m = (80 ± 2 )Kg, and its length (180 ± 5) cm then the measure of mass is ........ the measure of length

• more accurate

• same accuracy

• less accuracy

mole is the unit of ....

• temperature

• quantity of material

• plane angle

• luminous intensity

if x = y.z where the dimension of x is M L⁰ T and the unit of z is Kg, then the quantity y is .....

• mass

• length

• temperature

• time

the following physical quantity are fundamental except .....

• mass

• force

• time

• length

if x = y + cz , where y is a force and z has dimensional formula L T ^-2 then the quantity represented by c is......

• mass

• length

• time

• temperature

7x10 ^-4 milliAmpere = …………. µ Ampere

• 0.07

• 0.7

• 7

• 70

If Z = Y X and the unit of X is m/s and the dimensions of Y is M then Z represent

• Force

• Pressure

• Work

• Momentum

when measure the length , we can measure it by.....

• direct measurement only

• indirect measurement only

• both direct and indirect measurement