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Astronomy

01/18/22

pls help me with this

If a planet was located approximately 23 thousand light-years from the center of a galaxy and orbits that center once every 273 million years, how fast is the planet traveling around the galaxy in... more

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Astronomy Science

12/31/21

photons and how the massless atom miraculously weighs less than an electron

an proton is a massless particle which can travel at the speed of light because of this. how does it weigh more than an electron.

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Astronomy Chemistry Physics

11/19/21

identify and explain what of the solar event has just been described are the danger from the solar event more likely to damage satellites ground-based power grids and unprotected astronauts

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Astronomy

11/15/21

Astronomy Question

Use the link below to help answer the questions:https://phet.colorado.edu/sims/html/gravity-and-orbits/latest/gravity-and-orbits_en.htmlWhen you open the link, check the gravity force checkbox and... more

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Astronomy

10/23/21

A star with a radius like that of the Sun and a surface temperature three times that of the Sun, will have luminosity ______ times as great as the Sun’s luminosity.

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Astronomy

10/07/21

Life in the universe.

Determine the densities of the following exoplanets and classify them.Epsilon 3Mass: 15.01 MERadius: 4.36 REDensity: ................. g/cm3Classification: rocky/Terrestrial or gas giant or ice... more

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Astronomy Physics Space Astrophysics

09/30/21

How can a black hole be electricaly charged if it sucks up all matter (including electrons and protons)

How can a black hole be electricaly charged if it sucks up all matter (including electrons and protons)?thanks!

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Astronomy

09/29/21

Electromagnetic waves carry energy.

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Astronomy

09/22/21

Astronomer class

NASA is currently developing the Space Launch System, or SLS, which will be arguably the most powerful rocket ever built. It is designed primarily to transport astronauts to Mars with a travel time... more

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Astronomy

09/22/21

Astronomer class

What speed would be required in order to reach the nearest star within a reasonable travel time of 10 years? Give your answer in units of kilometers per year (km yr-1)

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Astronomy

09/18/21

If blue light has a wavelength of 400 nm and infrared light has a wavelength of 800 nm, what is the frequency of the blue light compared to the infrared?

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Astronomy Physics Astrophysics

09/11/21

1. How much stronger is the gravitational force of the Sun on Earth, compared to the gravitational force of the Sun on Pluto?

Full question: How much stronger is the gravitational force of the Sun on Earth, compared to the gravitational force of the Sun on Pluto? Pluto’s semimajor axis is 40 AU, and its mass is 0.002... more

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Astronomy

06/12/21

How many extra-solar planets had been found prior to Kepler's research?

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Astronomy

06/12/21

Why are researchers more interested in rocky planets that might be found in a star’s habitable zone, then in gaseous planets?

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Astronomy

06/12/21

what are the general features that we expect any star’s habitable zone to have?

What are the general features that we expect any star’s habitable zone to have?

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Astronomy Science Astrophysics

06/06/21

What is the theory of relativity in simple terms? - Easy to understand

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Astronomy Chemistry Physics Physical Science

06/02/21

Electricity, resistance, current, voltage, physics

a circuit operates at 1000 watts, within the circuit we have a 10 ohm, 20 ohm, and 40 ohm resistors.a) if the resistors are connected in parallel, what would their equivalent resistance be? b)... more

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Astronomy

05/28/21

Imagine that the graph of RV/D for the galaxies you drew had a steeper slope. What implication would that have for the rate of the universe's expansion?

There is no relationship between the steepness of the slope and the rate of expansion.The steeper the slope, the slower the expansion.The steeper the slope, the faster the expansion.

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Astronomy

05/28/21

Which of the following statements best describes cosmological redshift?

The universe (space) is expanding in front of us.Galactic clusters are rushing away from us.The universe (space) is expanding in all directions.Galactic clusters are rushing toward us.

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Astronomy

05/28/21

Doppler redshift is the redshifting of spectra from objects moving away from us, and cosmological redshift is the redshifting of objects moving toward us.

Doppler redshift is the redshifting of spectra from objects moving away from us, and cosmological redshift is the redshifting of objects moving toward us.truefalse

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Astronomy

05/28/21

The relationship between Recession Velocity (RV) and Distance (D) is such that we infer that the universe is contracting.

The relationship between Recession Velocity (RV) and Distance (D) is such that we infer that the universe is contracting.truefalse

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Astronomy

05/28/21

In units only, no numbers, what is the slope of the Hubble Constant line?

Pc/sec/Kmm/sec/Mpckm/sec/MpcMkm/sec/pc

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Astronomy

05/28/21

For slope of the Hubble Constant, what does the 'rise' direction represent?

DistanceX axisY axisRecession Velocity (RV)

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Astronomy Chemistry Physics Physical Science

05/19/21

Potential energy/velocity

roller coaster 1: Potential energy: 1,617,000J, mass 5,500kgRollercoaster 2: potential energy: 2,205,000J, mass: 5,000kggravitational constant: 9.8 roller coaster 1 has no kinetic energy, and at... more

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Astronomy Chemistry Physics Physics B

05/17/21

Electric Potential

Electric Potential Formula: V= K*q/rElectric potential energy Formula: UE= Kq1q2/rWhat is the electric potential energy between a particle with 1*10^-9 C of charge and a particle with -1*10^-9 C of... more

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pls help me with this

photons and how the massless atom miraculously weighs less than an electron

identify and explain what of the solar event has just been described are the danger from the solar event more likely to damage satellites ground-based power grids and unprotected astronauts

Astronomy Question

A star with a radius like that of the Sun and a surface temperature three times that of the Sun, will have luminosity ______ times as great as the Sun’s luminosity.

Life in the universe.

How can a black hole be electricaly charged if it sucks up all matter (including electrons and protons)

Electromagnetic waves carry energy.

Astronomer class

Astronomer class

If blue light has a wavelength of 400 nm and infrared light has a wavelength of 800 nm, what is the frequency of the blue light compared to the infrared?

1. How much stronger is the gravitational force of the Sun on Earth, compared to the gravitational force of the Sun on Pluto?

How many extra-solar planets had been found prior to Kepler's research?

Why are researchers more interested in rocky planets that might be found in a star’s habitable zone, then in gaseous planets?

what are the general features that we expect any star’s habitable zone to have?

What is the theory of relativity in simple terms? - Easy to understand

Electricity, resistance, current, voltage, physics

Imagine that the graph of RV/D for the galaxies you drew had a steeper slope. What implication would that have for the rate of the universe's expansion?

Which of the following statements best describes cosmological redshift?

Doppler redshift is the redshifting of spectra from objects moving away from us, and cosmological redshift is the redshifting of objects moving toward us.

The relationship between Recession Velocity (RV) and Distance (D) is such that we infer that the universe is contracting.

In units only, no numbers, what is the slope of the Hubble Constant line?

For slope of the Hubble Constant, what does the 'rise' direction represent?

Potential energy/velocity

Electric Potential

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