Why do elliptical galaxies appear yellow or red?
A) a. They have very little dust or cool gas, and thus have little ongoing star formation
B) b. They contain only massive-stars that have progressed to the red-giant stage C) c. They contain no hot, young blue stars
D) a and c
E) a and c
E
Answer:
period = 0.833 s
frequency=1.2 Hz
Explanation:
The period is the duration of time taken for a 1 heartbeat
Frequency is the number of heartbeats per second
Because the bridges are higher than the roads. :)
The ground is a foundation for many of the things of our lives. It is the foundation for the buildings in our life such as our houses, schools, work, hospital, and so on. It is the foundation for our lives that we often take for granted and it nurtured the trees and nature around us.