# Science

The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that

A) cooler air molecules move more slowly and respond less readily to the energy of a sound wave

B) cooler air molecules move more quickly and respond less readily to the energy of a sound wave.

C) Cooler air molecules do not move and respond less readily to the energy of a sound wave.

D) cooler air molecules move more randomly and less readily to the energy of a sound wave

I think it is a.

1. 👍 0
2. 👎 0
3. 👁 214
1. Cool air is denser, and sound does travel faster in denser mediums, but it seems to travel faster, at higher temperatures. This phenomenon occurs because hot air molecules tend to move around faster than they don in cold air. Go with answer a.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physics waves- check answer please

I would like to know if my answer is correct. Thanks in advanced! A person with their head sideways in the water sees a beaver slap its tail on the lake surface 1.2 km away. What is the time difference between the sound heard in

asked by Liz on April 21, 2014
2. ### Physics waves- check answer please

I would like to know if my answer is correct. Thanks in advanced! A person with their head sideways in the water sees a beaver slap its tail on the lake surface 1.2 km away. What is the time difference between the sound heard in

asked by Liz on April 22, 2014
3. ### writting a program

Speed of Sound. Sound travels through air as a result of collisions between the molecules in the air. The temperature of the air affects the speed of the molecules, which in turn affects the speed of sound. The velocity of sound

asked by sarah on February 23, 2012
4. ### 9th grade

Use the following Info. At sea level the speed of sound in air is linearly related to air temp. If 35 degrees Celsius sound travels at a rate of 352meters per sec. if 15degrees Celsius sound travels at 340 meters per sec. How

asked by Kaela on November 15, 2010
5. ### Physics waves- check answers please

I am not too sure if my answers are correct. Here are the questions: 1. A student standing near a brick wall claps her hands and hears the echo 0.250 s later. If the speed of sound was 340.0 m/s, how far from the wall was she? For

asked by Liz on April 21, 2014
6. ### physics!!!

A copper rod is given a sharp compressional blow at one end. The sound of the blow, traveling through air at -2.79 degrees Celsius, reaches the opposite end of the rod 9.39ms later than the sound transmitted through the rod. What

asked by Ashleigh on November 8, 2010
7. ### physics

The speed of sound in air varies with the temperature and humidity of the air. In dry air at 20 degrees Celsius, the speed of sound is approximately 343 m/sec. A closed tube resonates with a node at each end for a sound wave in

asked by Ann on February 19, 2014
8. ### Physical Science

The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from

asked by Charles on March 2, 2014
9. ### physical science

whats the speed of sound in air at 30 degrees Celsius.

asked by Raja on July 7, 2011
10. ### Physics

At what temperature, in degrees Celsius, is the speed of sound in air 341 m/s?

asked by Emily on December 4, 2017

More Similar Questions