Which of the following statements describes what happens when a sound wave moves from air into water?
a. The speed of the sound wave increases.
b. The speed of the sound wave decreases.
c. The frequency of the sound wave increases.
d. The wavelength of the sound wave decreases.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!