Sound waves in air are a series of

a. periodic disturbances.

b. periodic condensations and rarefactions.

c. high - and low-pressure regions.

d. all of the above E. none of the above

When you blow up a balloon, what happens to the volume of air inside the balloon?

Which statement best describes the variables in a controlled experiment?

A flute player hears four beats per second when she compares her note to an 880 Hz tuning fork (note A). She can match the frequency of the tuning fork by pulling out the "tuning joint" to lengthen her flute slightly. What was her initial frequency?

Order the speed of sound through these materials from the slowest to the fastest. speed of sound in cold air speed of sound in hot molten lead speed of sound in warm air speed of sound in water

You are traveling upstream on a river at dusk. you see a buoy with the number 4 and a flashing red light. what should you do?

When describing how power and work are similar you would want to mention that

Define newton's first law and provide an example

Biomes on Earth have exhibited changes throughout history that have been caused by a variety of factors. Over the past 50 years, the amount of tropical rainforest acreage found throughout the world has decreased from 14.8 billion acres to 8.

Three pithballs are suspended from thin threads. Various objects are then rubbed against other objects (nylon against silk, glass against polyester, etc.

Which of The following are classiFcatons describing how rock and oTher maTerial movedownslope? a. Fall, b. slide, c. slump, d. creep, e. fow