Astronomy

A plot of the continuous spectra of five different stars is shown in the figure. Based on these ...

A plot of the continuous spectra of five different stars is shown in the figure. Based on these ...

Nwere   59   3 Replies

Tkonrye

In the diagram, which of the transitions would absorb a photon with the greatest energy (shortest ...

In the diagram, which of the transitions would absorb a photon with the greatest energy (shortest ...

RICHDANGER123   72   3 Replies

ahleaders

The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along ...

The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along ...

chrystalhdz   318   1 Reply

tyeoi

The diagram shows a plot of the temperature of the sun as a function of distance above the bottom ...

The diagram shows a plot of the temperature of the sun as a function of distance above the bottom ...

Stevend95   51   3 Replies

beunique90

Are cosmic rays a form of light?

Are cosmic rays a form of light?

Are  cosmic rays a form of light?
      
a. Yes, they are light waves with lower energy than radio waves.
      
b. Yes, they are the name we give to all rays of light that come from the cosmos.
      
c. Yes, they are light wa

Charlie Lem   120   1 Reply

bio_man

Astronomers sometimes make use of "neutrino telescopes," which are typically located ...

Astronomers sometimes make use of "neutrino telescopes," which are typically located ...

Astronomers sometimes make use of "neutrino telescopes," which are typically located deep underground. What are  neutrinos?
      
a. A very low-energy form of light
      
b. A type of wave predicted to exist by Einstein&#

Charlie Lem   172   1 Reply

bio_man

We can see the Moon because it ________.

We can see the Moon because it ________.

We can see the Moon because it ________.
      
a. emits visible light
      
b. emits thermal radiation
      
c. reflects visible light
      
d. reflects infrared light
      
e. glows through radioactive decay

Charlie Lem   122   1 Reply

bio_man

What is the main factor that makes Earth more geologically active than the other terrestrial…

What is the main factor that makes Earth more geologically active than the other terrestrial…

What is the  main factor that makes Earth more geologically active than the other terrestrial planets?
      
a. It has far more radioactive material than other planets.
      
b. It is larger, so it has retained its internal heat fo

Charlie Lem   121   1 Reply

bio_man

you were given the chance to use a radio telescope to "listen" for signals from ...

you were given the chance to use a radio telescope to "listen" for signals from ...

If you were given the chance to use a radio telescope to "listen" for signals from possible extraterrestrial civilizations, which 60-degree "pie wedge" would you choose, and why? How would the two factors that you explored in the

Cristal Acevedo   256   3 Replies

duddy

"Beauty" in Astronomy: In the absence of observational evidence, scientists often rely on other ...

"Beauty" in Astronomy: In the absence of observational evidence, scientists often rely on other ...

"Beauty" in Astronomy: In the absence of observational evidence, scientists often rely on other considerations to make decisions. One such consideration that we have met before (Chapter 3) is Occam's razor: the simplest explanation is to be preferred

KeeBeeUtiful   66   1 Reply

mllmmom2000

(From a science quiz that appeared in the weekly magazine The Economist.) Economic history is easier ...

(From a science quiz that appeared in the weekly magazine The Economist.) Economic history is easier ...

(From a science quiz that appeared in the weekly magazine The Economist.) Economic history is easier to write than the history of the universe. Nevertheless, most cosmologists now think that when the universe was formed,
A) first there was a Big Bang

Jay.M   86   1 Reply

vivianli

(Use diagram of abundance vs atomic number) What process best explains the observed pattern of ...

(Use diagram of abundance vs atomic number) What process best explains the observed pattern of ...

(Use diagram of abundance vs atomic number) What process best explains the observed pattern of abundances of elements with atomic numbers between 6 and 20?
A) fusion reactions with hydrogen nuclei
B) fusion reactions with helium nuclei
C) radioactive

pbjt   89   1 Reply

Marostegui

2012 Prediction.... Nostradamus predictions?

2012 Prediction.... Nostradamus predictions?

Nostradamus was very precise in his astronomy, and the galactic alignment theory is the only theory that's makes any sense.. Is this true.

Can someone explain the galactic theory to me please and why it wont happen.

fireman2101   387   6 Replies

rivatayah

A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm ...

A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm ...

A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest.
 
  (a) Write down its equation of motion.
 

Jade.Lee   42   2 Replies

Jade.Lee

A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm ...

A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm ...

A 0.30-kg mass is suspended on a spring. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest. Write down its equation of motion.
 
  A) y = (0.0

Moe.S   81   3 Replies

knappstr95

A 0.32 kg ball is moving horizontally 30. m/s just before bouncing off a wall, thereafter moving 25. ...

A 0.32 kg ball is moving horizontally 30. m/s just before bouncing off a wall, thereafter moving 25. ...

A 0.32 kg ball is moving horizontally 30. m/s just before bouncing off a wall, thereafter moving 25. m/s in the opposite direction.
 
  (a) What is the magnitude of its change in momentum?
  (b) What percentage of the kinetic energy w

Hoshuia   87   3 Replies

allyf328

A 10 solar mass star is about ten times more luminous than a 1 solar mass star.

A 10 solar mass star is about ten times more luminous than a 1 solar mass star.

A 10 solar mass star is about ten times more luminous than a 1 solar mass star.
A) True
B) False

Havakajs   128   1 Reply

UnRaquel

A 100. gram steel bullet moves at 250. m/s just before imbedding itself into a thick anchored wood ...

A 100. gram steel bullet moves at 250. m/s just before imbedding itself into a thick anchored wood ...

A 100. gram steel bullet moves at 250. m/s just before imbedding itself into a thick anchored wood post. If 40. of the initial kinetic energy goes into heating the bullet (steel c = 460.J/kg-C):
 
  (a) how hot does the bullet become if it

rylee19   41   2 Replies

rylee19

A 150. A full scale galvanometer is used as a 1.00 A full scale ammeter when shunted by 3.3 m. What ...

A 150. A full scale galvanometer is used as a 1.00 A full scale ammeter when shunted by 3.3 m. What ...

A 150. A full scale galvanometer is used as a 1.00 A full scale ammeter when shunted by 3.3 m. What is the coil resistance of the galvanometer?
 
  What will be an ideal response?

Question 2

Ojs123   68   3 Replies

bcspears

A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction ...

A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction ...

A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction at 5.00 m/s. The collision is perfectly inelastic.
 
  (a) What is the speed of the auto immediately after the collision?
  (b) What p

vr   85   2 Replies

vr

A 3.0 cm tall statue is 48. cm in front of a biconvex lens (focal length 20. cm). (a) Is the ...

A 3.0 cm tall statue is 48. cm in front of a biconvex lens (focal length 20. cm). (a) Is the ...

A 3.0 cm tall statue is 48. cm in front of a biconvex lens (focal length 20. cm).
 
  (a) Is the image real or virtual?
  (b) How far is the image from the lens?
  (c) Is the image upright or inverted?
  (d) How high is the

Catc   57   2 Replies

Catc

A 35 N-force toward the west is applied to an object. The object moves 20 m east during the time the ...

A 35 N-force toward the west is applied to an object. The object moves 20 m east during the time the ...

A 35 N-force toward the west is applied to an object. The object moves 20 m east during the time the force is applied. What is the change in kinetic energy of the object?
 
  A) 0.0 J
  B) 0.57 J
  C) 1.0 J
  D) -700 J

dfysb54w   78   2 Replies

dfysb54w

A 3rd magnitude star is 3 times brighter than a 1st magnitude star.

A 3rd magnitude star is 3 times brighter than a 1st magnitude star.

A 3rd magnitude star is 3 times brighter than a 1st magnitude star.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

The constellation of

ornobtizzi   57   2 Replies

ornobtizzi

A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 ...

A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 ...

A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?
 
  A) 116.80
  B) 1168.00
  C) 14.60
  D) 16.80
  E) 1

kimmykgirl19   71   2 Replies

kimmykgirl19

A 55-cm brass rod has a diameter of 30 cm. The compressive strength of steel is 250 106 N/m2. What ...

A 55-cm brass rod has a diameter of 30 cm. The compressive strength of steel is 250 106 N/m2. What ...

A 55-cm brass rod has a diameter of 30 cm. The compressive strength of steel is 250  106 N/m2. What is the compression force that would break the rod?
 
  A) 1.8  107 N
  B) 2.4  107 N
  C) 1.4  108 N
  D) 2.4  108 N
 

bekah02   46   2 Replies

bekah02

A ball is dropped from the top of a science building. After falling for three seconds, the speed of ...

A ball is dropped from the top of a science building. After falling for three seconds, the speed of ...

A ball is dropped from the top of a science building. After falling for three seconds, the speed of the ball would be _______________ m/sec.
 
  Fill in the blank(s) with correct word

Question 2

RedManchester23   69   2 Replies

RedManchester23

A ball, of mass 100. g, is dropped from a height of 12. m. Its momentum when it strikes the ground ...

A ball, of mass 100. g, is dropped from a height of 12. m. Its momentum when it strikes the ground ...

A ball, of mass 100. g, is dropped from a height of 12. m. Its momentum when it strikes the ground is
 
  A) 1.5 kgm/s.
  B) 4.8 kgm/s.
  C) 3.3 kgm/s.
  D) 2.4 kgm/s.
  E) 1.8 kgm/s.

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tere   72   3 Replies

transfer

A bar magnet is dropped, N pole down, so it falls through a horizontal loop of wire. As it ...

A bar magnet is dropped, N pole down, so it falls through a horizontal loop of wire. As it ...

A bar magnet is dropped, N pole down, so it falls through a horizontal loop of wire. As it approaches the loop, the induced current (viewed from above) is:
 
  A) clockwise
  B) counterclockwise
  C) zero

[f

Maria   49   2 Replies

Maria

A battery creates net electric charge. (True or false?)

A battery creates net electric charge. (True or false?)

A battery creates net electric charge.
 
  Indicate whether the statement is true or false

Question 2

The top-down approach to creating artificial life starts
 
  A) in the

pmulkerr   68   2 Replies

pmulkerr

A battery is rated at 12. V and 160. A h. How much charge does the battery store? What will be ...

A battery is rated at 12. V and 160. A h. How much charge does the battery store? What will be ...

A battery is rated at 12. V and 160. A  h. How much charge does the battery store?
 
  What will be an ideal response?

Question 2

In a vacuum, the relative permeability is
 

mrs.anderson   61   1 Reply

letsdothis545

A beam of light passes through a polarizer and then an analyzer. In this process, the intensity of ...

A beam of light passes through a polarizer and then an analyzer. In this process, the intensity of ...

A beam of light passes through a polarizer and then an analyzer. In this process, the intensity of the light transmitted is reduced to 10 of the intensity incident on the analyzer.
 
  What is the angle between the axes of the polarizer an

Alexis23   43   2 Replies

Alexis23

A binary star system is one with two stars orbiting each other. How can the Dop

A binary star system is one with two stars orbiting each other. How can the Dop

A binary star system is one with two stars orbiting each other.  How can the Doppler Effect be used to find binary stars whose orbital plane is along our line of sight?  Their periods?

barry   448   2 Replies

barry

A black hole can be thought of as

A black hole can be thought of as

A black hole can be thought of as
 
  a. a very massive object of finite size.
  b. a shell of material expanding from a white dwarf.
  c. a massive body of infinitely small size.
  d. a burnt out white dwarf.

[col

blahfuk5   61   1 Reply

slayer909

A blown fuse has : (Multiple Choice)

A blown fuse has : (Multiple Choice)

A blown fuse has
 
  A) moderate resistance.
  B) zero resistance.
  C) infinite (very large) resistance.

Question 2

In using ray tracing to graphically locate the image of

avaasadi   69   2 Replies

avaasadi

A blue camera filter appears blue because it transmits blue light, absorbing all other colors.

A blue camera filter appears blue because it transmits blue light, absorbing all other colors.

A blue camera filter appears blue because it transmits blue light, absorbing all other colors.
A) True
B) False

jayjayhussle310   124   1 Reply

Marvinbog

A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass ...

A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass ...

A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50 kg. If the boy sits 1.5 m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium?
 

ilan707   71   3 Replies

Tokelo

A boy jumps at a speed of 20.0 m/s at an angle of 25.0 above the horizontal. What is the horizontal ...

A boy jumps at a speed of 20.0 m/s at an angle of 25.0 above the horizontal. What is the horizontal ...

A boy jumps at a speed of 20.0 m/s at an angle of 25.0 above the horizontal. What is the horizontal component of the boy's velocity?
 
  A) 18.1 m/s
  B) 15.6 m/s
  C) 8.5 m/s
  D) 12.6 m/s
  E) 20.0 m/s

[colo

Nwere   65   3 Replies

EEEEErica

A butterfly moves with a speed of v = 12.0 m/s. The x-component of its velocity is 8.00 m/s. The ...

A butterfly moves with a speed of v = 12.0 m/s. The x-component of its velocity is 8.00 m/s. The ...

A butterfly moves with a speed of v = 12.0 m/s. The x-component of its velocity is 8.00 m/s. The angle between the direction of its motion and the x-axis must be
 
  A) 60.0
  B) 41.8
  C) 48.2
  D) 30.0
  E) 53.0
[b

antionett15   47   2 Replies

antionett15

A camper is about to drink his morning coffee. He pours 400 grams of coffee, initially at 75.0C into ...

A camper is about to drink his morning coffee. He pours 400 grams of coffee, initially at 75.0C into ...

A camper is about to drink his morning coffee. He pours 400 grams of coffee, initially at 75.0C into a 250-g aluminum cup, initially at 16.0C.
 
  What is the equilibrium temperature of the coffee-cup system, assuming no heat is lost to th

claudiawong05   106   2 Replies

claudiawong05

A car and a truck are traveling in the same direction along a straight section of highway. The car ...

A car and a truck are traveling in the same direction along a straight section of highway. The car ...

A car and a truck are traveling in the same direction along a straight section of highway. The car is moving at 55. mph and the truck is moving 45. mph. What is the velocity of the car relative to the truck?
 
  What will be an ideal respo

bgarlipp   64   1 Reply

tomg2113