What observational fact convinces astronomers that the source of energy in a typical quasar is physically very small?.
Answer:
An extreme redshift of emission lines that indicated high recessional
What does nuclear fission have to do with the birth of stars?
Answer:
Fission is the process by which large nuclei (like Uranium) split apart releasing energy. Fusion is the joining of nuclei to make larger nuclei, with the release of energy. A ball of contracting interstellar gas becomes a star like the Sun when fusion reactions start in its center. Then, we say "a star is born."
Answer: When light element atoms are crushed under enough pressure for their nuclei to fuse, a star is formed. All stars are the consequence of a balance of forces: gravity compresses interstellar gas atoms until fusion reactions begin.
Explanation:
What label should mateo place in the marked cell? uses electrical energy provides electrical energy measures electric current controls electric current
The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.
What is a product label?A product label refers to a paper-document which contains information about the chemical elements, nutrients, and other compounds that are present in a product and its function.
In this scenario, the product label which Mateo should place in the marked cell is that this product was designed and developed to provide electrical energy, based on the electrical symbol for battery shown in the image attached below.
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What did hegel and kant have in common? they both were determined to disprove marxist theory. they both thought that only history could reveal universal truths. they both refused to completely abandon the role of religion in their work. they both believed that perception was an important element in understanding reality.
Answer:
The two philosophers furthermore seem to share the same conception of the conditions of human freedom. For Hegel as well as Kant, a theory of morality and political right devoted to advancing the cause of freedom must require more than just the absence of obstacles preventing the satisfaction of our animal passions.
Explanation:
Hope that help ;)
EDGE— Sometimes doctors have difficulty seeing tumors on images of the brain when they are very small. Which form of nanotechnology is most likely to help improve brain imaging?
Dendrimers are the form of nanotechnology is most likely to help improve brain imaging.
What is nanotechnology?Nanotechnology is the near-atomic manipulation of matter to create new structures, materials, and gadgets.
The technique offers scientific improvement in a variety of fields, including medical, consumer goods, energy, materials, and manufacturing.
Dendrites are a kind of nanoparticle that has been studied extensively for a variety of medicinal applications, including medication administration, imaging, and diagnostics in the brain.
Hence,dendrimers are the form of nanotechnology is most likely to help improve brain imaging.
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Answer:
B. Quantum Dots
Explanation:
Nanotechnology with quantum dots allows for better imaging while examining the body.
What is the acceleration of a train that takes 22 seconds to go from a speed of 73 kilometers per hour to a speed of 45 kilometers per hour?
The acceleration of a train that takes 22 seconds to go from a speed of 73 kilometers per hour to a speed of 45 kilometers per hour is 0.354 m/s².
What is acceleration?
Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
Acceleration is a change in velocity divided by a change in time. Given the time of 22 seconds and the distance is 73 kilometers. The speed is 45 k/h
(73 - 45 ) = 28 km / hr
Change in velocity = 7.778 m/s
7.778 m/s / 22 s = 0.354 m/s².
Therefore, the acceleration of a train is 0.354 m/s².
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Answer:
Below
Explanation:
73 km / hr = 20.277 m/s and 45 km/hr = 12.50 m/s
Acceleration = change in velocity / change in time
(12.5 - 20.277) m/s / 22 s = - . 354 m/s^2
( NOTE the negative sign....this is a DEceleration)
What particles bond together to
form molecules?
A. Atoms
B. Neutrons
C. Compounds
D. Protons
Answer:
atoms bond together and forms molecules
Answer:
Atoms
Explanation:
this is because when atoms join or bond together forms a molecule
Can Pineapple be on pizza
Answer:
yes quite a few people love eating Pineapple on pizza
Answer:
yes, if you want pineapple be in pizza
A student says that the two terms speed and frequency of the wave refer to the same thing. What is your response?
Answer:
He is wrong!
Explanation:
Frequency refers to how many wave lengths pass in a second and speed is how fast the wave is traveling for example the speed of light goes really fast but has a mid-level frequency.
Hope this helps! ;-)
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
Option 2
Explanation:
When something is acidifying on the pH scale, it generally means the pH is decreasing. Hence, the correct option for the question is :
The ocean pH is decreasingOcean acidification means the acidity of the ocean water is increasing
We know according to pH scale
pH<7 is acidicSo
the pH of oxygen is tending to 1 which is most acidic .
Ocean pH is decreasing (B)Two rocks, A and B, are thrown horizontally from the top of a cliff. Rock A has an initial speed of 10 meters per second and rock B has an initial speed of 20 meters per second. How would you describe the time it takes for the rocks to reach the ground and the horizontal distance they travel?
Answer:
i need help
Explanation:
what is importance of powder painting?
Answer:
It provides a more durable finish than liquid paints can offer, while still providing an attractive finish
Ben created the table below to identify the roles of
different parts of the eye.
Part
Role
Cones
provide color visions through three
types of cells
Lens
focuses light to form an
upside-down, virtual image
Iris
adjusts the size of the pupil to
control the amount of light
receives image of the object and
contains cells that detect light
Retina
Which describes Ben's error?
There is a single type of cone cell.
The lens forms a real image.
The iris is a hole through which light passes.
The retina carries the signals to the brain.
Answer:
the answer is The lens forms a real image.
Explanation:
got it right on edge
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
See below ~
Explanation:
Sun - provides energy that drives the cycleprecipitation - water falling from the skyrunoff - water moving across impervious surfacesseepage - water soaking into the groundevaporation - liquid water becoming a vapor to return to the atmospherecondensation - water vapor returning to liquid formThe answers are
Sun
Provides energy that drives the circle.precipitation
water falling from skyrun off
Water moving across impervious surfacesevaporation
Liquid water becomes vapour to return to the atmosphereseapage
water soaking into the groundcondensation
water vapour returning to liquid formWhat type of nuclear reaction is shown in the diagram below? Write 2 - 3 sentences describing what happens in this reaction, where it happens, and how the energy released can be harnessed for use in homes.
This happens at Sun 's inside
The process is called fusionThis denotes to
When two hydrogen nucleus combine to form a single helium nucleus.It releases lots of solar energy which can be used to create electricity
is a superheated cloud of gas and dust swirling around a massive object (usually a black hole or neutron star) this cloud can reach incredible speeds and temperatures as gravity causes it to build up more and more friction, eventually releasing x rays.
a. Nebula
c. Accretion Disk
b. Proto-star
d. White Dwarf
A superheated cloud of gas and dust swirling around a massive object (usually a black hole or neutron star) is called an accretion disk. The correct option is c.
What is accretion disk?Accretion disk is a heavy object surrounded by flow of gas, plasma, dust, or particles. The materials surrounding the heavy object orbiting in the gravitational field of the object that loses energy and angular momentum as it slowly spirals inward.
This cloud can reach incredible speeds and temperatures as gravity causes it to build up more and more friction, eventually releasing x rays.
Thus, accretion disk is a superheated cloud of gas and dust swirling around a massive object.
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Which statement about Sagittarius A* is true?
A: It is a quasar.
B: It orbits our sun.
C: It is 26,000 light-years away from earth.
D: It is set to subsume the earth in 100,000 years.
Answer:
It orbits our sun is the correct answer
Sagittarius A* is 26,000 light-years away from earth. Hence, option (C) is correct.
What is Sagittarius A*?Sagittarius A* (Sgr A*), a supermassive black hole at the center of the Milky Way Galaxy with a mass equal to four million Suns, is seen in the constellation of Sagittarius. It is a powerful radio source that is a part of the larger Sagittarius A complex.
One of Chandra's largest observing missions to date led to these new discoveries. In order to obtain the first-ever X-ray photos and energy fingerprints of the multi-million degree plasma swirling around Sgr A*, a black hole with around 4 million times the mass of the Sun, Chandra made observations over the course of nearly five weeks in 2012.
Sgr A* is one of the very few black holes in the cosmos where we can really observe the flow of stuff close by, and it is only 26,000 light years away from Earth.
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The magnetic field 0.225 m from a
wire is 4.29 x 10-7 t. how much
current is flowing through the wire?
need asap please will give brainiest
Answer:
i = 0.483 A
Explanation:
B = [tex]\frac{U.i}{2pi*r}[/tex]
So, here the r is 0.225 m
The Magnetic field is 4.29 x [tex]10^{-7}[/tex] t
U. = 4π x [tex]10^{-7}[/tex] x i
4.29 x [tex]10^{-7}[/tex] = (4π x [tex]10^{-7}[/tex] x i) / (2π * 0.225)
Cutting [tex]10^{-7}[/tex]
4.29 = [tex]\frac{4π * i}{2π * 0.225}[/tex]
4π and 2π canceled, left with 2
4.29 = [tex]\frac{2i}{0.225}[/tex]
4.29*0.225 = 2i
0.96525 = 2i
i = [tex]\frac{0.96525}{2}[/tex]
i = 0.482625 A
Rounding to 3 digits after decimal, we get
∴ i = 0.483 A
PLEASE HELP:
Calculate the net force on the box shown in the picture:
Determine the DIRECTION that this box will move once the force is exerted on it.
Determine whether this is a balanced or unbalanced force and what direction the box moves.
ill give u brainliest :)
Answer:
17N
Explanation:
the side with most net force is going to be deducted by the side with the least net force.
Select the correct sentences on the image.
Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball's journey will
be the greatest force acting on the ball?
Answer:
when the ball falls down
Explanation:
because gravity is a very strong Force
Answer:
a
Explanation:a
Why is it important to be careful interpreting absolute ages of clastic sedimentary rocks such as sandstones?
Answer:
You need to be careful when finding the true age of sedimentary rocks to understand its full history.
Explanation:
Identify the reactants and products in each of the following reactions: sodium +carbon > sodium hydroxide +hydrogen
Answer:
Hydrochloric acid and sodium hydroxide interact, resulting in salt and a release of heat. As we can see, the result of the interaction of two highly aggressive compounds is table salt and water – compounds that are ultimately harmless, even beneficial, to human beings.
Explanation:
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a racing car has a uniform acceleration of 5 metre per second square what distance will it cover in 10 seconds after the start
will mark as brainlist
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Option C, speed of light will increase as the light rays moves from water to air.
What is refraction of light?The refraction of light is the change in speed of light when it moves from one medium to another.
Light travels faster when it moves from a denser medium to a less dense medium while the speed of light decreases when light passes from a less to a more dense medium.
Water is more dense than air, thus speed of light will increase as the light rays moves from water to air.
Option C depicts increase in speed from water to air.
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While unearthing ancient pottery in the gobi desert, an archaeologist discovers a pot containing a large amount of naturally radioactive americium-241, which experiences alpha decay.
the archaeologist needs to protect himself, but also doesn't want to overheat in the desert sun. in addition to a facemask, what is the most appropriate safety precaution that the archaeologist should take to protect against the alpha particles without overheating?
The most appropriate safety precaution that the archaeologist should take to protect against the alpha particles without overheating by wear a pair of normal leather gloves. Option D is correct.
What is radioactivity?
The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.
Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.
Radiation is also important in agriculture, archaeology, space exploration, law enforcement, geology a variety of other fields.
The most appropriate safety precaution that the archaeologist should take to protect against the alpha particles without overheating by wear a pair of normal leather gloves.
Hence, option D is correct.
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Why can you get a shock if you touch a metal doorknob after walking across a wool carpet? (1 Point) You have gained electrons; the doorknob has no electrons. You have gained neutrons; the doorknob has fewer electrons. You have lost electrons; the doorknob has many electrons. You have gained electrons; the doorknob has many electrons.
Why can you get a shock if you touch a metal doorknob after walking across a wool carpet is because you have gained neutrons; the doorknob has fewer electrons. This is further explained below.
What are electrons?Electrons can be defined as a stable subatomic particles with a negative electrical charge that is found in all atoms and serves as the major carrier of electricity in solids.
In conclusion, You have an unbalanced charge, while the doorknob is neutral. you have gained neutrons; the doorknob has fewer electrons.
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3. The distance from a makeup mirror to C (the radius of curvature) is 70 cm. How far from the mirror
can a person be and still see an upright, magnified image?
The far point from the mirror can a person be and still see an upright, magnified image is focus i.e. 35cm from mirror.
What is radius of curvature?The mirror is made out of a sphere which has its radius called the radius of curvature.
The focal length f is half of the radius of curvature R of the lens.
Given the radius of curvature is 70cm, then focal length will be 70/2 = 35cm.
The makeup mirror is a concave mirror which forms real and upright images. The magnified images are obtained when the object is placed between focus and mirror.
Thus, the far point is focus i.e. 35cm from mirror.
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What is potential energy?
Energy from chemicals
Energy that is stored
Energy from light
Energy of motion
Answer:
stored
Explanation:
P. E . = m g h
represents STORED energy in the form of the height * acceleration of gravity * mass
178 79 Au is a(n) __
of gold
Answer: No, but yes
Explanation:
EXPLAIN IT
compare charging by rubbing and charging by sharing
Charging by rubbing needs physical contact, and charging by sharing does not need any contact.
What is the charge?When the matter is put in an electromagnetic field, it has an electric charge, which causes it to experience a force. Similar charges repel each other, whereas dissimilar charges attract each other.
An electrical charge is created when two distinct insulating materials are rubbed together.
Charge sharing is a signal degradation phenomenon that occurs when charges are transferred from one electronic domain to another.
Electrostatics is the phenomenon of charging by rubbing, whereas induction is the phenomenon of charging by sharing.
Hence, charging by rubbing needs physical contact, and charging by sharing does not need any contact.
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