7. A wave has a speed of 12 m/s and a period of 0.25 s. What is its wavelength? а. 0.25 m C. 3.0 m b. 1.5 m d. 48 m

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7.
A wave has a speed of 12 m/s and a period of 0.25 s. What is its wavelength?
а.
0.25 m
С.
3.0 m
b. 1.5 m
d. 48 m
8. Sounds with the same loudness and pitch may differ in
a. amplitude
С.
quality
b. frequency
d. wavelength
9. A sound wave has a low pitch. Therefore, it has a low
a.
amplitude
С.
wavelength
b. frequency
d.
wave velocity
10. Which of the following statements best describes violet light as compared to the
other colors of light?
a. It is the least intense.
b. It has the least energy.
It has the lowest frequency.
d. It has the shortest wavelength.
С.
11. Blue light has a shorter wavelength than and
red light.
a.
the same frequency as
b.
a lower frequency than
С.
a higher frequency than
d.
an uncomparable frequency with
12. If one end of a metal knitting needle with three tiny pieces of wax placed 2 cm
apart is heated in the flame of a candle, which of the following will happen?
а.
The wax in the middle will melt first.
b. The wax closest to the flame will melt first.
С.
The pieces of wax will melt at the same time.
d. The wax farthest from the flame will melt first.
13. Which of the following statements describing the movement of fluids in a
convection cell is true?
а.
Denser fluid rises.
b.
Denser fluid sinks.
С.
Density is not a factor for the movement of the fluids.
d.
none of the above
Transcribed Image Text:7. A wave has a speed of 12 m/s and a period of 0.25 s. What is its wavelength? а. 0.25 m С. 3.0 m b. 1.5 m d. 48 m 8. Sounds with the same loudness and pitch may differ in a. amplitude С. quality b. frequency d. wavelength 9. A sound wave has a low pitch. Therefore, it has a low a. amplitude С. wavelength b. frequency d. wave velocity 10. Which of the following statements best describes violet light as compared to the other colors of light? a. It is the least intense. b. It has the least energy. It has the lowest frequency. d. It has the shortest wavelength. С. 11. Blue light has a shorter wavelength than and red light. a. the same frequency as b. a lower frequency than С. a higher frequency than d. an uncomparable frequency with 12. If one end of a metal knitting needle with three tiny pieces of wax placed 2 cm apart is heated in the flame of a candle, which of the following will happen? а. The wax in the middle will melt first. b. The wax closest to the flame will melt first. С. The pieces of wax will melt at the same time. d. The wax farthest from the flame will melt first. 13. Which of the following statements describing the movement of fluids in a convection cell is true? а. Denser fluid rises. b. Denser fluid sinks. С. Density is not a factor for the movement of the fluids. d. none of the above
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