Physik
Kinematik, Kraftanalyse, Elektrizität und Gleichungslogik.
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when does the quasar stage of a galaxys life end? the quasar will event…
It ends when there is no longer enough gas to sustain a high level of accretion onto the hole.
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nearby quasars are rare because o galaxies located relatively close to …
they existed during an earlier period of the Universe and so today must be located at great distances.
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section 1.4 12. a meter stick with millimeters as its smallest graduati…
C. 205.5 mm
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nearby quasars are rare because ○ galaxies located relatively close to …
they existed during an earlier period of the Universe and so today must be located at great distances.
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what properties of a galaxy are correlated with the mass of the central…
Correlated: bulge mass, variation of the velocities of central stars Not correlated: disk luminosity, galaxy color, number of pulsars in a galaxy, sub - structure luminosity
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what properties of a galaxy are correlated with the mass of the central…
Correlated: bulge mass, disk luminosity, galaxy color Not correlated: number of pulsars in a galaxy, ultraviolet luminosity
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which observations can confirm that an object is a quasar? select all t…
measured redshift is extremely large for a bright starlike source high variability in the object's luminosity radio jet associated with an optical source
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which of these characteristics are true of quasars, and which are false…
True: associated with galaxies False: always powerful radio source, associated with nearby stars, powered by material traveling faster than light, among the most powerful objects …
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the luminosity of a galaxy with an active galactic nucleus (agn) is the…
The luminosity of a galaxy with an active galactic nucleus (AGN) is higher than the luminosity of a normal galaxy with a similar mass and distance. An active galactic nucleus can …
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active galactic nuclei (agn) are powered by nuclear reactions. hypernov…
matter falling into the supermassive black hole at the center of a galaxy.
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active galactic nuclei (agn) often vary in brightness on timescales of …
small enough for light to move across it in the observed time of variation.
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what is a distinguishing morphological characteristic of an irregular g…
1. C. no regular shape 2. A. spiral
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question 24 of 25 > classify the galaxies as spiral or elliptical galax…
Spiral galaxies: a galaxy that is actively forming new stars and has a blue color, a galaxy with a disk about 1000 light - years thick, a galaxy that is rich in gas and dust Ellip…
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a spiral galaxy containing a significant amount of dark matter will com…
C. spin faster
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the more distant a galaxy is, the more stationary it appears. the more …
The more distant a galaxy is, the more quickly it is moving away. Thus, the Universe must be expanding.
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most galaxies are traveling toward earth. stationary relative to earth.…
First question: C. traveling away from Earth. Second question: B. the more quickly it is moving away.
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the hubble tuning fork diagram for galaxies is useful because it organi…
categorizes galaxies by shape and appearance.
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question 20 of 25 > consider the image. the image shows galaxy. an irre…
a spiral
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the hubble constant is about 70 km/s/mpc, which means that a galaxy tra…
2800 km/s
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why do we need to add buffer into the master mix? a) to increase master…
c) To stabilize reaction pH
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the graph shows the relationship between a galaxys velocity (in kilomet…
35 Mpc
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question 1 which of the following was a consequence of chinas decision …
the loss of Hong Kong
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each point is the measured recessional velocity and distance to a galax…
100
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using the apparent magnitude of a certain type ia supernova, astronomer…
in another spiral galaxy
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the progenitors of type la supernovae are all roughly the same mass. be…
Type Ia supernovae are the result of a white dwarf accreting enough mass to pass the Chandrasekhar limit.
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the cosmic distance ladder is an overlapping chain of techniques used f…
Hubble constant, type Ia supernovae, RR - Lyrae stars, parallax, radar measurements of planets
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approximating powers of numbers less than one the $r^{th}$ term in the …
# Explicación: ## Paso 1: Fórmula del binomio de Newton La expansión binomial de \((a + b)^n=\sum_{r = 1}^{n + 1}{}_{n}C_{r - 1}a^{n-(r - 1)}b^{r - 1}\), donde \({}_{n}C_{r-1}=\fr…
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what happened to many jewish people living in arab countries after isra…
They faced violence and were forced to leave their homes.
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sound travels at 330 m/sec. if a lightning bolt strikes the ground 5 m …
$\frac{1}{66}$ s or approximately $0.015$ s
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story b (15341) a doctor describes what he observed during the nakba in…
A. Confused pets being left behind B. Armed Israeli soldiers acting aggressively E. Arab families leaving town with what they could carry
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background information: this is from a statement made by an israeli for…
to explain why Israel was justified in attacking the Egyptian forces
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multiple - choice question what do all of the mass extinctions have in …
None of the above options are correct.
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tom, tom sherbourne, a veteran who was once a lighthouse keeper in aust…
B. Tom has mixed feelings about the reunions, but he doesn't attend because he wants to avoid painful memories.
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at the shop in hong kong, the chinese man tells the americans that they…
No correct option can be determined from the given information.
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a 150 - pound person uses 6.1 calories per minute when walking at a spe…
27
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multiple - choice question what are these sharks being killed for? shar…
Shark fins are often used in soup as they are considered a status symbol, especially for weddings in Southeast Asia.
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astronomers believe there are supermassive black holes at the centers o…
stellar motion there indicates there is more mass than can be accounted for with normal matter.
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ponds and lakes can be natural or manmade. please select the best answe…
A. T
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question 12 of 25 > which of these are actual evidence for the existenc…
1. True 2. True 3. True 4. False 5. True 6. False
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what important function do stream pools serve? a. stream pools serve as…
D. All of the above
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sagittarius a* is the site of the supermassive black hole at the center…
the site of the supermassive black hole at the center of the Milky Way.
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identify which of the statements about dark matter are true. dark matte…
Dark matter does not emit electromagnetic radiation. Dark matter can only be detected by its gravitational effects.
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question 3 of 25 resources ai tutor expected rotation curve this image …
This illustrates that there is a large amount of dark matter in the Milky Way.
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riparian zones are important to the natural environment because they __…
D. all of the above
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dust obscures visible light from distant stars. therefore, how can astr…
Radio telescopes capture data on the motion of hydrogen gas all through the Galaxy.
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eutrophication is always the result of human activity. please select th…
F
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stream pools are more similar to ponds than lakes are. please select th…
T
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in the milky way galaxy, older, redder stars are generally found in the…
Older, redder stars: halo; Younger, bluer stars: spiral arms
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question 6 of 25. classify each characteristic according to whether it …
Population I and II stars: higher percentage of metals Population III stars: formed earlier in the Universe's history, more massive, less luminous
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complete each statement about stellar motion in the milky way galaxy. d…
1. Disk stars 2. Halo stars 3. Both disk and halo stars
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read the excerpt from the brazilian constitution of 1988. a member of t…
It has protections to keep the military from taking power again.
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what is causing the next extinction event already starting in the anthr…
Human impact
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a movement for democracy how did the mothers of the plaza de mayo help …
They criticized the military junta in Argentina until it was forced to hold free elections.
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how many mass extinction events have there been in the history of the p…
five
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compare ponds, lakes, and stream pools.
Ponds are small and shallow. Lakes are larger and deeper. Stream pools are deeper sections within a stream connected to flowing water, different from the more static ponds and lak…
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identify the components of the milky way. face - on view edge - on view…
From top - to - bottom (assuming the top label in face - on view): spiral arms, Galactic disk, Galactic bulge, Galactic halo
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move the label to show where the sun should be in this artists concept …
Move the "Sun" label to the Local Arm.
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what observations did harlow shapley make that indicated that the sun i…
Shapley's observations: star counts in different parts of the night sky, distribution of globular clusters in space Not Shapley's observations: distribution of cold molecular clou…
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the main difference between stream pools and ponds is that stream pools…
A. have an observable current
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how do littoral zones differ from riparian zones?
Littoral zones are along shores of large still or slow - moving water bodies (lakes, seas, oceans), while riparian zones are adjacent to flowing water bodies (rivers, streams).
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decomposition in pools, ponds, and lakes takes place mostly in the ____…
C. benthic
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explain the process of eutrophication.
Eutrophication is the process by which a water - body becomes overly enriched with nutrients, leading to excessive growth of algae and aquatic plants. This overgrowth, followed by…
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the ______________ nervous system is made of the brain and ____________…
D. Central / spinal cord
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which string method returns true if the character is a numeric charcter…
D. letter.isdigit()
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which of the following are strong passwords? select 3 options. dougdoug…
&oFhju78, NC20$sk3, Hko2%sdf
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executive order 9981 mandated which of the following? desegregation of …
desegregation of the armed forces
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which of the following are strong passwords? select 3 options. maryjone…
C. Yod7B*&, D. KtFlu$, B. NCkiuj25
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question # 5 multiple select a strong password should contain ______. s…
- lowercase characters - special characters - numeric characters - uppercase characters
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question # 4 multiple choice which string method returns true if the ch…
letter.isupper()
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complete the code to check the length of a password. when done, valid s…
lengthPassword = len(password) if lengthPassword > 20: valid = False elif lengthPassword < 8: valid = False
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question # 2 dropdown complete the code to check whether a string conta…
any, islower
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multiple choice which string method returns true if the character is a …
B. letter.islower()
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complete the sentence. are filters between the internet and a computer …
Firewalls
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complete the sentence. firewalls have rules that only allow certain fil…
network
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question # 2 multiple select digital security measures include ______. …
A. access control, B. firewalls, D. encryption, E. passwords (any 2 of these options are correct answers as they are all valid digital security measures)
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impossible difficult easy it is for employees to make mistakes that com…
easy
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complete the sentence. a hacker might use to send executable database c…
code injection
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which of these is a way of making applications less vulnerable to hacki…
make Deny the default
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which of these are ways that hackers gain access to computer systems? s…
packet sniffing, dumpster diving, phishing
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complete the sentence. involves placing a device on the network that ca…
Packet - sniffing
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question # 3 dropdown complete the sentence. to protect a web - based d…
data validation
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question # 2 multiple select which of these are ways a hacker might lea…
B. dumpster diving, C. keylogger, D. social engineering
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an advanced persistent threat social engineering a keylogger a botnet d…
Social engineering
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3 tries left what might be the best predictor of why some people do not…
A. emotional intelligence
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what was the commonality between becquerel and the curies in terms of t…
uranium
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question 5 3 tries left which of the following newborn infants is most …
Jerome, an African - American male
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question 13 (mandatory) (10 points) listen what is the term for lymphom…
Leukemia - lymphoma or lymphoid leukemia
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manganese - 52 has a half - life of 6 days. how many days would a scien…
18
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in contrast to comparing mental age to chronological age, most modern t…
age - group comparison norms
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question # 4 dropdown choose the correct term to complete the ser the t…
people; technology
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question 9 3 tries left according to sternberg, \book smarts\ is anothe…
D. analytical
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question 12 (mandatory) (10 points) what is typically found with non - …
Enlarged lymph nodes, fatigue, unexplained weight loss, night sweats, fever (among others)
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question 11 (mandatory) (10 points) listen what vitamin can increase ir…
Vitamin C
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radioactive isotope half - life which radioactive isotope would take th…
rubidium-91
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the little river salt marsh restoration project centered around replant…
A. T
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which best describes the results of becquerels experiments? when placed…
When placed in sunlight, the uranium did not form an image and when placed in darkness, the uranium did form an image.
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question 4 3 tries left trial and error is sometimes referred to as a(n…
D. heuristic
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the traditional view of mangrove forests as wastelands and unhealthy en…
B. people did not feel it was necessary to preserve them
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question 10 (mandatory) (10 points) what is the most sensitive test for…
Serum ferritin
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which of the following does not explain the importance of mangrove fore…
C. They increase surface runoff and flooding