The combination of sound waves with different frequencies is known as
interference
diffraction
superposition
forced vibration
resonance
Correct answer is C
No explanation has been provided for this answer.
20cm
45cm
54cm
63cm
70cm
Correct answer is A
\(\frac{\text{image height}}{\text{object height}}\) = \(\frac{\text{image distance}}{\text{object distance}}\)
\(\frac{10}{15}\) = \(\frac{\text{image distance}}{30}\)
image distance = 20cm
39.5J/kgoC
50.4J/kgoC
127.6J/kgoC
154.6J/kgoC
173.4J/kgoC
Correct answer is C
Heat lost = heat gained
0.25 x C1 x (170 - 12) = 0.1 x 4200 x (12 - 0)
C1 = 127.6J/kgoC
Which of the following statements is NOT true? Thermostats are used to control the temperature of
pressure cookers
laundry irons
hot water storage tanks
aquaria for tropical fish
heated apartments
Correct answer is A
No explanation has been provided for this answer.
pipette
burette
measuring cylinder
density
bottle
Correct answer is E
No explanation has been provided for this answer.