Answer:
a) Transverse and longitudinal
Explanation:
Depending on the medium in which the sound is traveling the wave can be longitudinal or transverse.
When traveling in fluids i.e., in liquids and gases the wave takes the form of a longitudinal wave. Longitudinal waves cause compression and rarefaction of the fluid.
When traveling in solids the wave takes the form of a transverse wave. Transverse waves leads to the formation of shear stresses in the solid.
C. Travels slower in solids because the particles are closer together.
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Answer: D.
They examine the spectra of extremely high-redshift galaxies.
Explanation:
Astronomers Measure Redshift and the most accurate way to measure redshift is by using spectroscopy. When a beam of white light strikes a triangular prism it is separated into its various components (ROYGBIV). This is known as a spectrum (plural: spectra).
With an estimated distance of about 32 billion light-years (comoving distance,) or 13.4 GLY (light-travel distance,) astronomers announced it as the mostdistant astronomical galaxy known
Distance = rate x time. Your rate is 2.5 meters per second and your time is 45 minutes. So d=2.5 x 45. Your distance is 112.5 meters.
Answer:
It is B. fish are more dense then water.
Explanation:
