PATRICIO_NY

each core, for a total of 8 running processes per quad core processor. If you were designing an algorithm for scheduling applications in a dual quad core system (up to 16 processes/threads running) how would you assign threads and processes to cores? (for example a process with two threads starts, on which cores/processors would those threads end up?)

Refer to this scenario for the following questions:

Lost in Spacetime. Just when you thought it was safe to take final exams . . . a vindictive multi-dimensional being reaches down (up? over? through?) to Earth and pulls you out of the universe. You are thrown back into the universe at a place of this being's choosing, and she permits you to leave only after you have identified your surroundings. You are subject to several tests.

Through a scientifically unexplainable miracle, you are able to survive in every one of the places you are tested. (Lest you become too comfortable, however, you certainly are able to feel any associated pain due to high temperature, pressure, gravity, etc.) In each case described below, identify your surroundings. In some cases, the surroundings described may exist only during eras of the universe (past or future) other than our own time; in those cases, you should identify both the place and the time where you are located.

You find yourself in a place that looks (except for your own presence) perfectly symmetrical. There is no way to distinguish one place from another, and all forces are one. With this perfect symmetry, there is no obvious way to define the flow of time. Where are you?

A)You are in the universe shortly after inflation.

B)You are in the early universe before the Planck time.

C)You are in the center of a young star.

D)You are floating somewhere in the universe near its end, 10100 years from now.

E)You are inside the nucleus of an atom.

2. SAME AS ABOVE BUT LAST PART

You are in a place that is extremely hot and dense, making you feel quite sweaty and claustrophobic. You can't see far because your surroundings are opaque to light. Around you, nuclear fusion is converting carbon into oxygen and other elements. Where are you?

You are in the center of a star much smaller than the Sun.

A)You are in the center of a star very much like our Sun.

B)You are inside a nuclear power plant on Earth.

C)You are in the center of a massive star near the end of its life.

D)You are in the early universe during the era of nucleosynthesis

3.Based on current evidence concerning the amount of deuterium in the universe, we can conclude that

A)ordinary (baryonic) matter makes up most of the mass of the universe.

B)neutrons greatly outnumber protons in the universe.

C)most of the deuterium that was created during the era of nucleosynthesis has since been destroyed.

D)the density of ordinary (baryonic) matter is between 1 percent and 10 percent of the critical density.

E)we live in a critical-density universe.

You are on the surface of an object, and you have a fairly clear view out into space. It might be very nice, except for one major drawback: You are very squashed. Also, light you observe from distant objects is apparently slightly blueshifted (compared to what it normally looks like). The surface of the object is composed primarily of carbon and oxygen, and the horizon distance is about the same as that on Earth. By observing the stellar background for a few weeks, you realize that there are several planets orbiting your object. Where are you?

A)You are on the surface of a white dwarf.

B) You are on the surface of a neutron star.

C)You are "on" an accretion disk around a black hole.

D)You are on the surface of a planet that is somewhat more massive than Earth.

E)You are on the surface of Earth.

True or False?

2.Suppose there are 10,000 civilizations existing in the Milky Way Galaxy right now. If the civilizations are randomly distributed throughout the disk of the galaxy, about how far (on average) would it be to the nearest civilization?(Hint: Start by finding the area of the Milky Way’s disk, assuming that it is circular and 100,000 lightyears in diameter. Then find the average area per civilization, and use the distance across this area to estimate the distance between civilizations.)

A)= 90ly

B)= 0.9 ly

C)= 900 ly

D)= 9*10^5 ly

3.Which of the following best explains why an interstellar ramjet could, in theory, achieve continuous acceleration?

A) It has such a large fuel tank that it will essentially never use up all the fuel it carries.

B)It uses fuel that is more efficient than any other known fuel.

C)It takes advantage of theoretically possible loopholes in Einstein's theory of relativity.

D)Its speed always gets faster because the effects of time dilation change the rate at which time flows.

E)It collects its fuel as it goes, rather than having to carry the weight of fuel along with it.

4.Why didn't oxygen begin to accumulate in the atmosphere until approximately 1.5 billion years after life appeared on Earth?

A)Oxygen produced by life was removed from the atmosphere by oxidation reactions with surface rocks.

B)Oxygen produced by life was removed from the atmosphere by dissolving in the ocean.

C)Early forms of animal life consumed the oxygen.

D)Early forms of plant life consumed oxygen.

E)All the oxygen produced by life went into making the ozone layer

It has no gas or dust.

It has no spiral arms.

It has an elongated bulge resembling a bar more than a sphere.

It has no bulge.

It is flatter in shape.

2.Hubble's "constant" is constant in

time.

space and time.

space.

our Galaxy but different in others.

3.Dr. X believes that the Hubble constant is H0 = 55 km/s/Mpc. Dr. Y believes it is H0 = 80 km/s/Mpc. Which statement below automatically follows?

Dr. X believes that the universe has a much higher density than Dr. Y believes.

Dr. X believes that the universe is expanding, but Dr. Y does not.

Dr. X believes that the universe will someday stop expanding, while Dr. Y believes it will expand forever.

Dr. X believes that the universe is older than Dr. Y believes.

Dr. X believes that the Andromeda Galaxy (a member of our Local Group) is moving away from us at a slower speed than Dr. Y believes.

Small galaxies outnumber large galaxies and produce most of the light in the universe.

Most galaxies in the universe are about the same size as the Milky Way.

Galaxies come in a wide variety of shapes and sizes but are all very blue in color.

Small galaxies outnumber large galaxies but large galaxies produce most of the light in the universe.

There is an approximately equal number of small and large galaxies in the universe and together they each contribute an equal amount of light.

2.Although it is difficult to tell from our vantage point inside the galaxy, astronomers suspect that the Milky Way is a barred spiral.

True or False

3.Stars are continually forming in the halo of our Galaxy today.

True or False

They have a smaller proportion of heavy elements

They are farther away

They have higher masses than other stars in the galaxy

They have fewer planets

true or false

2.What are cosmic rays?

lasers used as weapons by extraterrestrials

any light waves from space

fast-moving dust particles in the interstellar medium

gamma rays and X rays

subatomic particles that travel close to the speed of light

3.What is a shock wave?

the wave created when protons slam into electrons

a wave of pressure that moves slightly slower than the speed of sound

a wave of pressure that moves faster than the speed of sound

a wave of pressure that moves faster than the speed of light

a wave of electromagnetic energy that can create electrical shock

4.Sound waves in space

travel much faster than sound on Earth and are therefore very loud.

travel much faster than sound on Earth but have such low density that they are inaudible.

can travel through the halo but not the disk of the galaxy.

travel so slowly that they are unnoticeable.

do not exist

True or False

3.What causes the radio pulses of a pulsar?

The star's orbiting companion periodically eclipses the radio waves emitted by the main pulsar.

The star vibrates.

A black hole near the star absorbs energy and re-emits it as radio waves.

The star undergoes periodic explosions of nuclear fusion that generate radio emission.

As the star spins, beams of radio radiation sweep through space. If one of the beams crosses Earth, we observe a pulse.

low-mass star

high-mass star

intermediate-mass star

2.The helium fusion process works by fusing two helium nuclei into one beryllium nucleus.

True or False??

3.Which of the following properties make flare stars so active?

fast rotation rates

deep convection zones

strong stellar winds

convecting cores

both A and B

4.At approximately what temperature can helium fusion occur?

1 million K

a few million K

100,000 K

100 million K

100 billion K

Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts?

double star

eclipsing binary

visual binary

spectroscopic binary

none of the abo

2.What are the standard units for apparent brightness?

watts

watts per second

joules

watts per square meter

Newtons

3.The faintest star visible to the naked eye has an apparent visual magnitude of about

0.

1.

10.

6.

-6.

4.In a pulsating variable star, which characteristic of the star changes dramatically with time?

core temperature

mass

rotation rate

energy-generation process

luminosity

surface temperature on the horizontal axis and luminosity on the vertical axis

mass on the horizontal axis and stellar age on the vertical axis

surface temperature on the horizontal axis and radius on the vertical axis

mass on the horizontal axis and luminosity on the vertical axis

interior temperature on the horizontal axis and mass on the vertical axis

2.What are the standard units for luminosity?

Newtons

joules

kilograms

watts per second

watts

3.A star's luminosity is the

surface temperature of the star.

total amount of light that the star radiates each second.

lifetime of the star.

total amount of light that the star will radiate over its entire lifetime.

apparent brightness of the star in our sky.

4.Suppose you measure the parallax angle for a particular star to be 0.2 arcsecond. The distance to this star is

2 light-years.

0.2 parsec.

5 parsecs.

0.2 light-year.

impossible to determine.

1.Two stars have the same luminosity. Star X is spectral type F, while Star Y is spectral type K. Therefore, Star X is larger in radius than Star Y

T or F

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

T or F

3.Spectral type, surface temperature, and color all describe the same basic characteristic of a star.

T or F

4.We can measure stellar parallax for most stars in our galaxy.

T or F

thousands

hundreds

millions

billions

more than you could count in a lifetime

2.An electron-volt is?

the energy of one electron.

an amount of energy much larger than a joule.

the energy jump between the first and second energy levels of hydrogen.

the charge of one electron.

an amount of energy much smaller than a joule.

Just answer question please !

because they rarely interact with matter

because there are so rare

because they move at nearly the speed of light

because they are so small

because they have no mass

2.The light radiated from the Sun's surface reaches Earth in about 8 minutes, but the energy of that light was released by fusion in the solar core about

ten years ago.

one year ago.

a million years ago.

a thousand years ago.

a hundred years ago.

3.What are coronal holes?

A)tunnels in the outer layers of the Sun through which photons can escape more quickly than through the radiation zone

B) areas of the corona where magnetic field lines project into space, allowing charged particles to escape the Sun, becoming part of the solar wind

C)regions on the photosphere where magnetic lines poke through, creating the cooler areas of the sunspots

D)holes in the corona of the Sun that allow us to see the photosphere

E)all of the above

absorbs several photons of a specific frequency.

can absorb a photon of any frequency.

absorbs a photon of a specific frequency.

emits a photon of a specific frequency.

can emit a photon of any frequency.

2. If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects?

The one with the large redshift is hotter and therefore is putting out more radiation.

The one with the large redshift is moving away from us faster than the one with the small redshift.

The one with the large redshift is moving away from us, and the one with the small redshift is moving toward us.

The one with the large redshift is moving toward us faster than the one with the small redshift.

3.Consider an atom of gold in which the nucleus contains 79 protons and 118 neutrons. If it is doubly ionized, what is the charge of the gold ion and how many electrons remain in the ion?

The gold ion has a charge of +79 and no electrons.

The gold ion has a charge of +2 and 77 electrons.

The gold ion has a charge of +2 and 79 electrons.

The gold ion has a charge of -2 and 77 electrons.

The gold ion has a charge of +2 and 2 electrons.

4.The loss of an electron from a neutral helium atom results in

ionized hydrogen.

neutral hydrogen.

neutral deuterium.

ionized helium.

ionized deuterium

a positive charge of +2

a positive charge of +8

a total charge of +16

a negative charge of -4

none of the above

measured in hertz (Hz).

measured in cycles per second.

the number of peaks passing by any point each second.

equal to the speed of the wave divided by the wavelength of the wave.

all of the above

9000 watts

900 watts

900 joules

9000 joules

150 joules

magnetic forces

radiation pressure

gravitational forces

electrical forces

quantum mechanics.

general relativity.

special relativity.

particle physics.

classical mechanics.