1 . Digital camera converts ______ wave into _______wave . 2. A microphone converts _____ into _______ signal . 3. To print poster or banner ________ can be used .
If one puts one ears to the steel rail, the sound of a coming train can be heard even when the train cannot be seen. One can conclude from this observation that
A. Sound travels faster in steel than in air.
B. Amplitude of sound in the rail is much larger than in air.
C. Sound can travel larger distance in solids than in air.
D. Quality of sound in rail is better than in air.
If one puts one ears to the steel rail, the sound of a coming train can be heard even when the train cannot be seen. One can conclude from this observation that
A. Sound travels faster in steel than in air.
B. Amplitude of sound in the rail is much larger than in air.
C. Sound can travel larger distance in
solids than in air..
D. Quality of sound in rail is better than in air.
Answers & Comments
Answer:
If one puts one ears to the steel rail, the sound of a coming train can be heard even when the train cannot be seen. One can conclude from this observation that
A. Sound travels faster in steel than in air.
B. Amplitude of sound in the rail is much larger than in air.
C. Sound can travel larger distance in solids than in air.
D. Quality of sound in rail is better than in air.
The reasonable conclusion are
Verified answer
Answer:
If one puts one ears to the steel rail, the sound of a coming train can be heard even when the train cannot be seen. One can conclude from this observation that
A. Sound travels faster in steel than in air.
B. Amplitude of sound in the rail is much larger than in air.
C. Sound can travel larger distance in
solids than in air..
D. Quality of sound in rail is better than in air.
The reasonable conclusion are