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Vladimir [108]
3 years ago
8

Compared to a stationary galaxy, light from a galaxy that is moving away from earth will appear _____.

Physics
2 answers:
Vlad1618 [11]3 years ago
3 0
"B" When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.
nikklg [1K]3 years ago
3 0

Answer:

B) Redder

Explanation:

Think of it like this; a car passes by you, as it goes, it's horn gets louder, and then starts to become quieter as it moves further away. Redshift works the same way. When an galaxy starts to move away from Earth, it's light <em>appears </em>to be redder. (If it was moving closer to Earth, it would most likely become bluer.)

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An eagle is flying horizontally at a speed of 3.10 m/s when the fish in her talons wiggles loose and falls into the lake 6.10 m
Alinara [238K]

Answer:

10.93m/s with the assumption that the water in the lake is still (the water has a speed of zero)

Explanation:

The velocity of the fish relative to the water when it hits the water surface is equal to the resultant velocity between the fish and the water when it hits it.

The fish drops on the water surface vertically with a vertical velocity v. Nothing was said about the velocity of the water, hence we can safely assume that the velocity if the water in the lake is zero, meaning that it is still. Therefore the relative velocity becomes equal to the velocity v with which the fish strikes the water surface.

We use the first equation of motion for a free-falling body to obtain v as follows;

v = u + gt....................(1)

where g is acceleration due to gravity taken as 9.8m/s/s

It should also be noted that the horizontal and vertical components of the motion are independent of each other, hence we take u = 0 as the fish falls vertically.

To obtain t, we use the second equation of motion as stated;

h=ut+gt^2/2.................(2)

Given; h = 6.10m.

since u = 0 for the vertical motion;  equation (2) can be written as follows;

h=\frac{1}{2}gt^2............(3)

substituting;

6.1=\frac{1}{2}*9.8*t^2\\6.1=4.9t^2\\hence\\t^2=6.1/4.9\\t^2=1.24\\t=\sqrt{1.24}=1.12s

Putting this value of t in equation (1) we obtain the following;

v = 0 + 9.8*1.12

v = 10.93m/s

5 0
3 years ago
Participating in __________ can improve flexibility.
riadik2000 [5.3K]

Answer: Participating in all of the above can improve flexibility.

Explanation:

A practice that helps in improving or developing inherent power in order to bring peace and harmony to the body of a person is called yoga.

Yoga includes different postures that also help in providing flexibility to the body.

Pilates is another method of providing muscular strength and low impact flexibility to a human body.

Swimming also a good exercise that provides flexibility.

Thus, we can conclude that participating in all of the above can improve flexibility.

6 0
2 years ago
lightning sometimes happens between clouds. suggest a possible way that a discharge can occur between clouds
nataly862011 [7]
Most lightning happens inside a cloud, but sometimes it happens between the cloud and the ground. A build up of positive charge builds up on the ground beneath the cloud, attracted to the negative charge in the bottom of the cloud. The ground's positive charge concentrates around anything that sticks up-trees, lightning conductors, even people. The positive charge from the ground connects with the negative charge from the clouds and a spark of lightning strikes. 
5 0
2 years ago
What differentiates baseline actives from health enhancing activities?
german
A. The difference lies in the intensity of the activity
7 0
3 years ago
Why are variables important in a science investigation?
Arte-miy333 [17]
Because a variable is an important stratagy of science
3 0
3 years ago
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