Which describes the relationship between the frequency, wavelength, and speed of a wave as the wave travels through different media?

a). as speed changes, wavelength changes and frequency remains constant.
b). as speed changes, frequency changes and wavelength remains constant.
c). as speed changes, wavelength and frequency change. (not c)
d). as speed changes, wavelength and frequency remain constant.

As the wave travels through different media, its speed and wavelength change, and its frequency remains constant. (A)

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2