I. Choose the correct 1. The voice box is also called as
(a) stomach (b) heart (c) larynx (d) mouth
2.Sound is a kind of
(a) work (b) energy(c) force (d) pressure
3. The hearing range of human ear is
(a) 20 Hz to 20,000 Hz (b) less than 20 Hz (c) more than 20,000 Hz (d) 20 Hz to 25,000 Hz
4. Pitch of sound is determined by its
(a) frequency (b) speed (c) amplitude (d) loudness
5. The frequency of subsonic sound is
(a) more than 20 Hz (b) 100 Hz (c) less than 20 Hz (d) more than 20,000 Hz
6. Cochlea is a part of
(a) hearing organ (b) sound producing organ(c) muscular organ (d) air pollution
7. Sound cannot travel through
(a) air (b) water (c) air (d) vacuum
8.The sound in the audible range is called
(a) ultrasonic sound (b) sonic sound (c) subsonic sound (d) light sound

1. c

2. b

3. a

4. a

5. a

6. a

7. d

8. b

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.