Which of the following statements is correct about light and sound waves? Both
are longitudinal waves
are transverse waves
have the same velocity in air
need a medium for propagation
transmit energy
Correct answer is E
No explanation has been provided for this answer.
Economic problem arises as a result of
Choice
Money cost
Opportunity cost
Scarcity
Scale of preference
Correct answer is D
No explanation has been provided for this answer.
The trade-off between two commodities along the Production Possibility Curve (PPC) shows
Opportunity cost principle
Scarcity principle
Transferable output
Unattainable combination
Under utilization of resources
Correct answer is D
No explanation has been provided for this answer.
0.05s
1.00s
2.00s
3.14s
6.28s
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about a gas is NOT correct?
It has no definite shape
It is compressible
Its molecules are closely packed
Its molecules gain kinetic energy when heated
Its molecules move about randomly
Correct answer is C
No explanation has been provided for this answer.