In a closed organ pipe producing a musical note, an antinode will always be produced at
the closed end
the open end
the middle
all the parts of the pipe
Correct answer is B
No explanation has been provided for this answer.
The physical properties of sound waves can best be described by
reflection and diffraction
polarization and reflection
polarization and diffraction
polarization and refraction
Correct answer is A
No explanation has been provided for this answer.
One valid assumption of the kinetic theory of gasses is the
the molecules of a gas are constantly in a state of motion and the number of collision remains constant
the number of molecule of gas increases with increasing pressure
as the temperature increases, the number of collision made by the gas molecule remains constant
the molecules of gas are all identical and are very small in size
Correct answer is D
No explanation has been provided for this answer.
A vapour is said to be saturated when
more molecules return to the liquid than the amount that left it
a dynamic equilibrium exists between the molecules of the liquid and the vapour molecules at a given temperature
the vapour pressure is equal to the atmospheric pressure
all molecules are moving with the same speed in all directions at a given temperature
Correct answer is B
No explanation has been provided for this answer.
200g
300g
320g
400g
Correct answer is A
Heat lost = Heat gained
mc\(\theta\) = mL
m x 4200 x 17 = 42 x 3.4 x 105
therefore, m = 200g