Physical Quantities

Question 1

What is a homogenous equation?

Answer 1

A physical equation that is dimensionally correct.
(units are the same throughout the equation)
Homogeneity is a necessary but not a sufficient condition for the correctness of physical equations.

Question 1

What are scalars and vectors?

Answer 1

Scalars quantity have only magnitude(size)

Vectors quantity have both magnitude and direction

Question 2

The sine formula.

Answer 2

A /sin a = B /sin b = C /sin c

Question 4

Define the Resultant?

Answer 4

The resultant of a system of vectors acting on a body is the single vector which has the same effect, in both magnitude and direction, as all the vectors.

Question 5

Define the Equilibrant.

Answer 5

The equilibrium of a system of vectors is the single vector which keeps the other vectors in equilibrium.
The equilibrium is equal in magnitude to the resultant but acts in the opposite direction.

Question 6

Define the Resultant?

Answer 6

the single vector which has the same effect, in both magnitude and direction, as all the vectors of a system.

Question 7

Define the Equilibrant.

Answer 7

The equilibrium of a system of vectors is the single vector which keeps the other vectors in equilibrium.
The equilibrium is equal in magnitude to the resultant but acts in the opposite direction.

Question 8

The 6 base quantities are:

Answer 8

Length (m)
Mass (kg)
Electric current (ampere)
Thermodynamic temperature (kelvin)
Time (second)
Amount of substance (moles)

Question 9

Define the Parallelogram Law of vectors

Answer 9

If two vectors are two adjacent sides of a parallelogram then the diagonal is equal to the resultant of the two vectors