34. Which of the following is an example of situation that possesses potential energy? A. A rolling ball
C. A rock in the garden
B. A runner reaching the finish line D. A car accelerating on a curved road
35. Around 331m/s is the speed of sound in the dry air, on which it is DC
A. 10
BO
C.1
D. 15
36. Why does concert usually take place during nighttime?
A. Sounds changes and refracts when it encounters a medium different density
B. Sound is more audible at night
C. Sound bounces off better at night
D. It's because there are fewer noises at night
37. It is used by scientist to map the seafloor and to determine the depth of the ocean
A. Echo sounding B. Reflection sound C. Sound wave D. Temperature
38. Refers to a vibration that travel through the air or another medium and can be heard when they
reach a person or animal ear.
A Heat
B. Temperature
C. Light
D. Sound
39. Why does echo is heard in an empty gymnasium?
A. Because the place is quiet C. Because there are only hard surface that why sound reflects
B. Because sound has nowhere to go D. All of the above
40. It is multiple reflections or echoes in a certain place
A. Echo
B. Reverberation C. Reflection D. Refraction
40 What is the effect of air temperature on the speed of sound?
A The higher the temperature the faster the sound
B. The higher the temperature the slower the sound
C. The temperature does not affect the speed of sound
D. None of the above
41. Supposed one side in the tug of war, Team Left exerts a force of 400 N, while the other side, Team
Right exerts a force of 300 N, what will be their net force? (Refer to the figure below)
Team Left
Team Right
A. 700 N
400 N
B. 100 N
300 N
C. 300 N
D 400 N
th
42 Two girls, Lila and Lily, are pushing the box at the same time with 6N of force each. What is the
net force acting on the cabinet? (Refer to the figure below.)
A 6N
BON
C 12 N
D. 3 N
43. You are riding a bike when you suddenly hit a large rock. The bike stops moving but you fly
over the handlebars
A Law of Inertia
C. Law of Interaction
B Law of Acceleration
D. Law of conservation