What makes the “lub-dubb” sound of the heartbeat?

The sound in at the end of words may be spelled ine, as in illumine, or en, as in darken. For below item fill in the blanks to spell the in sound correctly.
sull____

In some words, like exquisite, the kw sound is spelled with qu. With the definition of "to familiarize yourself with", write qu words that have the kw sound.

How do patients with ankylosing/paralysis sound?

The “lubb” sound (first heart sound) is caused by the

a. closing of the atrioventricular valves.

b. closing of the semilunar valves.

c. blood rushing out of the ventricles.

d. filling of the ventricles.

e. ventricular contraction.

Explain how you can recognize the sound of a flute.

The sound in at the end of words may be spelled ine, as in illumine, or en, as in darken. For below item fill in the blanks to spell the in sound correctly.
determ____

Explain how a flute, violin, and kettledrum produce sound.

What determines the loudness of a sound, and how is loudness measured?

What happens to the speed of sound when the temperature increases? Explain why this might happen.

The sound of sh is occasionally spelled ci, as in specious, or ti, as in sentience. Complete the word men_on with the correct spelling of the sh sound.

The sound in at the end of words may be spelled ine, as in illumine, or en, as in darken. For below item fill in the blanks to spell the in sound correctly.
fam____

A grunting porpoise emits sound at $57 \mathrm{~Hz}$. What is the wavelength of this sound in water, where the speed of sound is $1500 \mathrm{~m} / \mathrm{s}$ ?

The sound of sh is occasionally spelled ci, as in specious, or ti, as in sentience. Complete the word suspi__on with the right spelling of the sh sound.