Units and Dimensions Flashcards
1
Q
Define dimension
A
the power to which fundamental quantities are raised to express a physical quantity
2
Q
formula to convert unit from one system to another dimensionally
A
n1=n2((m2/m1)^a(l2/l1)^b(t2/t1)^c)
3
Q
List the 7 fundamental elements with their si units
A
mass kg length m time sec luminous intesity candela amt of substance mole temperature kelvin electric current ampere
4
Q
state principle of homogenity
A
states that “the terms added or subtracted to develop a equation to explain the physical laws must have same dimension”
5
Q
what is the formula to find momentum, specific heat capacity and gravitational constant
A
momentum= mass x velocity
specific heat capacity= Q/(mdt)
gravitational constant=Fd2/m1m2
6
Q
what is the value of G
A
6.67x10^-11 Nm2/kg2
