QUIZ II
Potential and kinetic
Effects of temperature to the speed of sound
1. The following situations demonstrate potential
energy EXCEPT:
A. a bullet fired from a gun
B. a child at the top of a slide
C. a car parked at the top of a hill
D. river water at the top of a waterfall
2. What is the speed of sound in dry air at 0°C?
A. 31 m/s
B. 331 m/s
C. 3100 m/s
D. 30100 m/s
3. Which wave property is observed when a boy
shouts and hears his own voice inside the church?
A. Echolocation
B. Reflection
C. Refraction
D. Reflection and refraction
4. How do you compare the PE of a moving object at
the highest point compared to its KE?
A. PE is greater than KE
B. KE is greater than PE
C. PE is less than KE
D. KE is less than PE
5. Which of the following pair of quantities are the
factors that affect kinetic energy?
A. Force and distance
B. Mass and height
C. Mass and speed
D. Time and height
Identify whether the objects in the given situations possess
Potential Energy or Kinetic Energy.
6. Bird flying
7. Log in a fireplace
8. Watermelon on a desk
9. Car travelling on the highway
10. Car sitting in a driveway
11. Bunch of coconut stick on a table
12. Ball bouncing on the floor
13. Child jumping on his bed
14. Child sleeping on the crib
15. Marble rolling down the ramp
SOLVE: 5 POINTS
How fast does the sound travel in Baguio City at a
temperature of 20°C?
[ Formula: 𝑣 = 331 𝑚/𝑠 + (0.6 𝑚/𝑠 ) ∙ 𝑇 ]
KEY ANSWER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
A
B
B
A
C
KE
PE
PE
KE
PE
PE
KE
KE
PE
KE
SOLVE:
Given : 20°C
𝑣 = 331 𝑚/𝑠 + (0.6 𝑚/𝑠 ) ∙ 𝑇
= 331 M/S + (O.6 m/s) . 20°C
= 331 m/s + 12 m/s
= 343 m/s