Answer:
The correct option is;
The star is moving toward Earth.
Explanation:
The shifting of the wavelength of light wave toward the blue end of the electromagnetic spectrum is termed blue shift.
A blue-shift of an electromagnetic wave corresponds to the wavelength decrease of the wave, which is equivalent increase in energy, resulting in an increase in the observed frequency of the wave.
Astronomers make use of the shifting of the wavelength of a wave to understand the relative motion of galaxies.
The wavelength of an approaching electromagnetic ave shifts towards the blue end of the electromagnetic spectrum because the wavelength is shorter.
The opposite of phenomenon is red-shift.
Answers:
A) 0.204 m
B) 0.285 s
Explanation:
<h2>Answer A:</h2>
This described situation is free fall, this means the initial velocity of the fly is zero, and the equation that will be used is:
(1)
Where:
is the final height of the fly
is the initial height of the fly
is the initial velocity of the fly
is the time
is the acceleration due to gravity
(2)
(3) This is the distance at which the fly would begin to beat its wings
<h2>Answer B:</h2>
In this part we will also use equation (1), but we will find the time:
(1)
Where:
is the final height of the fly
is the initial height of the fly
is the initial velocity of the fly
is the time we need to find
is the acceleration due to gravity
(4)
Isolating :
(5)
(6) This is the time it would take for a fly to hit the bottom of the box
It’s mass is 100 kg, because if you divide both numbers, you get 100
A black hole is a place in space where gravity pulls so much that even light can not get out.
