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Sergio039 [100]
3 years ago
11

Why do scientists believe the universe is still expanding?

Physics
1 answer:
strojnjashka [21]3 years ago
5 0
I don’t understand the question
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Earth orbits the sun once every
Karo-lina-s [1.5K]

Answer:1 trip around the earth is an angular displacement of 2*pi

3.6525*10^2 days

I

Explanation:24 h/1 day * 3.600*10^3 s/1h = 3.156*10^7 s

Angular speed = angular displacement / time

Angular speed = 2*pi rads / 3.156*10^7 s = 1.9910*10^-7 rad/s

3 0
3 years ago
A gazelle is running at 17.46 m/s. He sees a lion and accelerates at -1.49 m/s/s,
Vsevolod [243]

Answer:

V=21.0211m/s

Explanation:

Use V=vi+at

So, V=17.46m/s+(1.49m/s^{2})(2.39s)= 21.0211m/s

5 0
2 years ago
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20.What factor is more important in determining electrical force
Agata [3.3K]

Answer:

20.The first factor is the amount of charge on each object. The greater the charge, the greater the electric force. The second factor is the distance between the charges. The closer together the charges are, the greater the electric force is

Explanation:

6 0
3 years ago
What name is given to the process that occurs when light passes from air to water?
-Dominant- [34]

Answer:

Refraction

Explanation:

5 0
3 years ago
It takes Desmond from 4:00 to 9:00 to swim 27 km. What is his speed?
Hatshy [7]
The formula for speed is distance÷time. The distance in this situation is 27km and the amount of time taken to cover that distance is 5 hours. Now, we substitute the values into an equation:
Speed = 27km/5h
Speed = 5.4km/h
Therefore, Desmond's speed is 5.4km/h.
3 0
3 years ago
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