Answer:
It is moving away from Earth.
Explanation:
As the source comes closer to the observer then we can say that its frequency will increase.
So here we know that
[tex]\frac{\Delta \nu}{\nu} = \frac{v}{c}[/tex]
here we know that
v = speed of the star
c = speed of light
now if we know that speed of the star is towards us then the frequency will increase and hence the wavelength will decrease.
So it is known as Blue shift
While if the star is moving away from us then in that case the frequency will decrease and hence the wavelength will increase.
So here it is known as Red Shift.
So here correct answer will be
It is moving away from Earth.
How old is the moon!
4.53 billion years
1.653 trillion days
39.68 trillion hours
2.381 × 10^15 minutes
1.429 × 10^17 seconds
Answer:
4.53 billion years old
Explanation:
Moon is considered to be formed about 60 million years later to the formation of the solar system. The rocks brought from surface of moon suggest its age to be about 4.53 billion years. The Giant-impact hypothesis suggests that moon was formed when a Mars sized object collided with the Earth, the debris accreted to from the moon.
what are the two criteria necessary for a substance to be considered a magnet
Answer:The substance;
- must possess poles (north and south)
- exhibit force of attraction and repulsion i.e obeys law of magnetism)
Explanation:
For a substance to be considered a magnet, such magnet must be able to attract metallic objects to itself when placed in a magnetic field.
The substance must possesses free north and south poles at its ends because magnets generally possesses both the force of attraction and repulsion which is dependent on the nature of the poles of the magnetic substances coming together. Like poles of magnets (same poles) are known to repel each other while unlike poles (different poles) of magnets attracts each other
A substance is considered a magnet if it can generate a magnetic field and has both north and south poles. Magnetic fields are created by the movement of electric charges or inherent magnetic properties. In ferromagnetic substances, magnetic domains align in a manner that produces a large-scale magnetic field.
Explanation:To be considered a magnet, a substance must satisfy two essential criteria. Firstly, it needs to generate a magnetic field, which is an invisible force field that exerts a force on other ferromagnetic materials and moving electric charges. The magnetic field is produced either by the movement of electric charges or by intrinsic magnetic properties of the substance itself.
Secondly, a magnet must have both north and south poles. This is a fundamental property of all magnets: if you were to cut a bar magnet in half, you would end up with two smaller magnets, each with its own north and south pole. The two poles represent the directionality of the magnetic field - it emanates from the north pole and loops back into the south pole.
Common types of magnets, such as ferromagnets, achieve these properties through their structure at an atomic level. In ferromagnetic materials, small regions known as magnetic domains are created where atoms are grouped together with their magnetic dipoles aligned in the same direction, producing a noticeable large-scale magnetic field.
Learn more about Magnetism here:https://brainly.com/question/33916107
#SPJ13
The farther a planet is from the sun, the _________ its orbital motion is, and the _________ the gravitational attraction between the planet and the sun is.
Question 4 options:
slower, weaker
slower, stronger
faster, weaker
faster, stronger
The orbital motion is slower and gravitational attraction is weaker.
What is Kepler's law of planetary motion ?
Kepler's law of planetary motion states that, the line joining a planet and the sun sweeps equal areas in equal intervals of time. That means, as the planet approaches the sun it speeds up and as it moves away from the sun, it slows down.
Here,
The planet is farther from the sun.
According to Kepler's law of planetary motion, the speed of this planet is decreasing. So, its orbital motion becomes slower and as the distance between the planet and the sun increases, the gravitational attraction between them also becomes weak.
Hence,
The orbital motion is slower and gravitational attraction is weaker.
To learn more about Kepler's law of planetary motion, click:
https://brainly.com/question/12813684
#SPJ3
From which sphere does most water evaporate?
A. Lithosphere
B. Hydrosphere
C. Biosphere
D. Atmosphere
Suppose Eratosthenes’ results for Earth’s circumference were quite accurate. If the diameter of Earth is 12,740 km, what is the length of his stadium in kilometers?
Answer:
Length of one stadium = 0.1556 km
Explanation:
We have the diameter of Earth = 12740 km
Thus, circumference (C) of Earth is
[tex]=2\pi \frac{Diameter}{2} \\[/tex]
[tex]=2\times \pi \times \frac{12740}{2}[/tex]
C = 40023.89 km
Eratosthenes was a Greek polymath. He was the first to calculate the circumference of Earth. He had observed that at local noon on day of Summer Solstice, when Sun is overhead for the locations on Tropic of Cancer, a place named Syene had zero shadow day. Also on the same day the objects in Alexandria casts shadow. This proved that Earth is spherical and not flat. He went further and calculated the Sun angle ([tex]\theta[/tex]) for Alexandria by using a Rod (Gnomon). He found the angle to be about 7°. He also knew the distance (D) between Alexandria and Syene which was 5000 Stadia.
Lets say length of one stadia = S km
He used this data and simple concept of geometry as given below:
[tex]\frac{\theta }{360}=\frac{D}{C}[/tex]
[tex]=\frac{7}{360}=\frac{5000 \times S}{40023.89}[/tex]
[tex]=5000 \times S = \frac{7\times 40023.89}{360}[/tex]
[tex]=S = \frac{7\times 40023.89}{360\times5000}[/tex]
S = 0.1556 km
Which formula can be used to find tangential speed of an orbiting object?
Answer:
A) [tex]v = \frac{2\pi r}{T}[/tex]
Explanation:
As we know that the speed of the object is defined as the the ratio of total distance and total time taken
now as we know that here the distance along the path of the orbiting object is total length of the circle
so it is given as
[tex]L = 2\pi r[/tex]
also we know that
time period to complete the orbit is given as
[tex]t = T[/tex]
now the speed is given as
[tex]v = \frac{d}{t}[/tex]
[tex]v = \frac{2\pi r}{T}[/tex]
anybody wanna help me ? 10 points !!
A boat sails along the shore. To an observer, the boat appears to move at a speed of 22 m/s, and a man on the boat walking forward appears to have a speed of 23.1 m/s. How long does it take the man to move 3 m relative to the boat?
1) What describes the unusually large release of plasma from the sun's corona?
Auroras
CME
Solar wind
Solar flare
__________________________________________________________________
2) The table below compares the distances between two bodies.
Comparison of Distance
Bodies Distance
X and Y 30.2 AU
Y and Z 7.2 light years
Based on the table, which of the following statements could be true?
X and Y are both within the solar system.
Y and Z are both within the solar system.
X and Y are farther apart than Y and Z.
Y and Z are both present on Earth.
_____________________________________________________________________
Answer:
CME
Explanation:
They right^ aced the test
What is the periodic table of elements?
Question 5 options:a chart that organizes all the elements by their atomic number a chart that organizes all the naturally-occuring elements a chart that organizes all the elements by their atomic mass a chart that organizes all the elements created by humansAn atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of _____ amu. (Enter a whole number.)
PLEASE HELP ME!
C. What organelle is missing from E. coli?
Answer:
The organelle missing from E.coli is nuclear membrane.
Explanation:
A nuclear membrane is a double membrane that surrounds and protects the nucleus of a cell. The nuclear membrane is lacking because there is no need for one to protect a nucleus that does not exist. Bacteria cells are also prokaryotes, and all prokaryotes lack a nucleus.
For more information, Please refer to the link:
https://brainly.com/question/211369
If you were on the moon, and you were trying to move a 20-lb bowling ball and a 3-foot cube of Styrofoam, which item would take more work to move? Why? A. the bowling ball; it is a harder object B. the Styrofoam; it is larger C. the bowling ball; it has greater mass anywhere D. the Styrofoam; it weighs more on the moon
A compact car with a mass of 1,000 kg, traveling at 15 m/s, runs into and sticks to - an at-rest SUV of 2,200 kg. What is the final speed of the two cars? A. 4.7 m/s B. 67 m/s C. 2.2 m/s D. 147 m/s
Why was the Constitution written, according to the Preamble? A. to create a more perfect Union B. to end slavery C. to break free from Britain D. to give women the vote
What does the person in back of the ambulance experience? A) a lower frequency of the siren B) a lower amplitude of the siren C) a higher frequency of the siren Eliminate D) a higher amplitude of the siren
The answer to your question is "A. a lower frequency of the siren.
Because the person in back of the ambulance will hear a lower frequency of the siren. This is because the waves are stretched out. A longer wavelength results in a lower frequency.
Answer: The correct answer is A.
Explanation:
When there is a relative motion between the source and the observer then there will be change in the frequency or wavelength of the wave. This phenomenon is called Doppler effect.
For example, when the source and the observer are moving away from other then the frequency decreases in this case.
In the given problem, the person is in the back of the ambulance. In this case, the person in the back of the ambulance will listen a lower frequency of the wave. There will be longer wavelength.
Therefore, the correct answer is A.
Which statement accurately describes what happens when water turns to steam in terms of energy?
A.The water absorbs energy which causes chemical bonds to break, changing water to steam.
B. The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to gas.
C. The water releases energy which causes chemical bonds to break, changing water to steam.
D. The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.
C. The water releases energy which causes chemical bonds to break, changing water to steam.
PLEASE HURRY!!!
Answer:
D The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.
Explanation:
Good Luck ^^
The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas. The correct option is D.
What is kinetic energy?The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it.
We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.
Energy is absorbed by the water, increasing the kinetic and potential energy of the water molecules and converting them from a liquid to a gas.
Water molecules usually have the highest kinetic energy in the steam phase.
Thus, the correct option is D.
For more details regarding kinetic energy, visit:
https://brainly.com/question/26472013
#SPJ2
what is the wavelength of a wave?
A. the amount of time that one full cycle takes.
B. the distance from the beginning to the end of a cycle.
C. the amount of cycles that occur in a given time.
D. the distance traveled by the wave during one full cycle.
Mercury is the 80th position in the periodic table how many protons does it have
Eleonora is learning about the nervous system in school. She learns the nervous system is made up of many parts. What is the main purpose of the nervous system in the human body?
A. Releasing hormones to regulate body functions.
B. Circulating oxygen throughout the body.
C. Relating messages between the body and brain.
D. Protecting the body from foreign invaders
Answer:
Correct answer is c
Explanation:
the main purpose of the nervous system is relaying messages between the body and the brain
Relating messages between the body and brain is the main purpose of the nervous system in the human body. So, the correct option is C.
What is the Nervous system?The nervous system is defined as a highly complex part of an animal that coordinates its functions and sensory information by transmitting signals from different parts of its body. The nervous system transmits signals between the brain and the rest of the body which includes the internal organs.
The activity of the nervous system controls the ability to move, breathe, see, think, and many more where the basic unit of the nervous system is a nerve cell or neuron. Relating messages between the body and brain is the main purpose of the nervous system in the human body.
Therefore, the correct option is C.
Learn more about Nervous system, here:
https://brainly.com/question/29355295
#SPJ6
what is one joule work
what is the shape of the orbit of satellites
Answer:
The shape will be elliptical hopefully this helps!
give an example of fluid friction
According to its periodic table entry, how many electrons does nitrogen have in its valence level? 2 5 7 14
Magnet A and B are of equal magnetic strength and which position will magnets A&B have the greatest attraction for toward each other
30 PTS
Choose the best answer to describe light waves transmission when it meets a medium. * 1 point Spreads out in the medium Goes into the medium Goes through the medium Bounces off the medium Appears to bend in the medium
September 21 is the beginning of ________ in the southern hemisphere.
spring
summer
autumn
winter
Answer
Correct answer is Spring
Explanation
In southern hemisphere there are four seasons which are as follows
Spring
spring begins in the month of September
Summer
summer begins in the month of December
Autumn
autumn begins in the month of March
Winter
winter begins in the month of June.
spring
its the correct answer on the test,, goodluckk :)!
Based on the diagram, which of these conclusions is correct? The frequency of Wave 1 is double the frequency of Wave 2. The frequency of Wave 2 is double the frequency of Wave 1. The wavelength of Wave 1 is four times the wavelength of Wave 2. The wavelength of Wave 2 is four times the wavelength of Wave 1.
Answer: The frequency of Wave 2 is double the frequency of Wave 1.
NO ONE IS HELPING ME! I WILL GIVE THANKS AND STARS AND RATE JUST PLS HELP ME I WILL ALSO GIVE BRAINLEST !!! I AM SAYING THANK YOU IN ADVANCE PLS TRY YOU'RE BEST TO HELP ME OUT!!!
Describe an environment in which the sound of a ringing cell phone could not be transmitted, and explain why the ringing wouldn't be heard. Justify your reasoning using complete sentences.
Answer:
Explanation:
The sound of a ringing cellphone could not be transmitted or heard if the cellphone is enclosed in some sort of closed container from which the air has been removed. Sound is a mechanical wave, and so it must have some material substanceto travel through. Otherwise sound cannot travel from one place to another. The sound of the ringing could not travel through the vacuum inside the container if all the air were removed.
please help me i will mark beainliest
Which would be the best element to use in a semiconductor?
Question 5 options:
lithium (Li)
chlorine (Cl) )
silicon (Si)
carbon (C)