Question
In: Physics
The motion of the Alpha Centauri system has a radial component of 20 km/s towards the...
The motion of the Alpha Centauri system has a radial component of 20 km/s towards the Sun. What
is the measured Doppler shift in the spectral lines? (give your answer as a percentage of the speed
of sound either towards the blue or the red). With a measured proper motion of 3.7 arcsec/year (or
3.7”/yr) at a distance of 1.3 pc, what is the true space motion velocity of the Alpha Centauri system?
Pick Alpha Centauri A, from a HR diagram, read of the temperature and luminosity. With this,
calculate its radius. Haw can you estimate its mass and why? With the mass, how long did it take for
this star to arrive at the main sequence? How long will it stay in the main sequence? What is its fate?
Solutions
genius_generous answered 2 years agoRelated Solutions
The Sun has an apparent magnitude of -26.74. The closest star system to us, Alpha Centauri,...
The Sun has an apparent magnitude of -26.74. The closest star
system to us, Alpha Centauri, has an apparent magnitude of +0.01
and a luminosity of 1.1519 times that of the Sun. How much brighter
is the Sun compared to Alpha Centauri? How close is this star
system to us?
Question 4: Alpha Centauri is a binary star system (the two individual stars are called Alpha...
Question 4: Alpha Centauri is a binary star system (the two
individual stars are called Alpha Centauri A and B) that is part of
a triple star system (the third star is Proxima Centauri). This is
the closest star system to the Sun. Alpha Centauri A and B are so
close that if they are viewed with the naked eye they are seen as
one star from the Earth. The absolute magnitude of Alpha Centauri A
is 4.4, while the...
The closest known star to our solar system is Alpha Centauri, which is approximately 4.30 light...
The closest known star to our solar system is Alpha Centauri,
which is approximately 4.30 light years away. Spaceship A, with a
constant speed of 0.800c relative to the Earth and a proper length
of 100 m, travels from Earth to this star. Spaceship B with a
constant speed of 0.600c relative to the Earth travels from Earth
to this star.
(a) How much time would elapse during Spaceship A’s trip on a clock
on Earth?
(b) How much time...
You throw a ball towards a wall at a speed of 20 m/s and at an...
You throw a ball towards a wall at a speed of 20 m/s and at an
angle of 50 degrees. The wall is 22 m away from you. (a) How far
above the release point does the ball hit the wall? (b) What is the
vertical component of the balls velocity when it hits the wall? (c)
What is the horizontal component of the balls velocity when it hits
the wall?
A meteor with a mass of 1 kg moving at 20 km/s collides with Jupiter's atmosphere....
A meteor with a mass of 1 kg moving at 20 km/s collides with
Jupiter's atmosphere. The meteor penetrates 100 km into the
atmosphere and disintegrates. What is the average force on the
meteor once it enters Jupiter's atmosphere (Ignore gravity).
*The answer is 2 x 10^3 N but I have no idea why.
An enzyme catalyzed reaction has a Km of 3.76 mM and a Vmax of 6.72 nM/s....
An enzyme catalyzed reaction has a Km of 3.76 mM and a Vmax of
6.72 nM/s. What is the reaction velocity in nM/s,
when the substrate concentrations are:
A. 0.500 mM
B. 15.6 mM
C. 252 mM
D. Now assume you have added a competitive inhibitor that has a
concentration of 15.6 µM with a KI of 7.30 µM to the
enzyme in question 9. Calculate the velocity at the same substrate
concentrations as above:
E. 0.500 mM
F. 15.6...
Suppose an enzyme has Km = 0.1mM and kcat = 10^3 s-1, and you perform an...
Suppose an enzyme has Km = 0.1mM and kcat = 10^3 s-1, and you
perform an experiment in which [E]tot = 10-7M. Suppose that adding
0.1 µM of an inhibitor results in a Kmeff= 0.5 mM, and has no
effect on kcat. Determine the substrate concentation that would be
necessary to achieve a reaction velocity v of 5*10^-5Ms-1
A meteoroid of mass = 555 kg has a speed of 90.0 m/s when 700 km...
A meteoroid of mass = 555 kg has a speed of 90.0 m/s when 700 km
above the Earth. It is falling vertically (ignore air resistance)
and strikes a bed of sand in which it is brought to rest in 3.49 m.
(a) How much work does the force of gravity do on the meteoroid on
the way to the surface? GJ (b) What is the speed of the meteoroid
just before striking the sand? m/s (c) How much work...
Alpha & Omega wants to invest in a new computer system, and management has narrowed the...
Alpha & Omega wants to invest in a new computer system, and
management has narrowed the choice to Systems A and B.
System A requires an up-front cost of $100,000, after which it
generates positive after-tax cash flows of $70,000 at the end of
each of the next 2 years. The system could be replaced every 2
years, and the cash inflows and outflows would remain the same.
System B also requires an up-front cost of $100,000, after which
it...
Alpha & Omega wants to invest in a new computer system, and management has narrowed the...
Alpha & Omega wants to invest in a new computer system, and
management has narrowed the choice to Systems A and B.
System A requires an up-front cost of $100,000, after which it
generates positive after-tax cash flows of $70,000 at the end of
each of the next 2 years. The system could be replaced every 2
years, and the cash inflows and outflows would remain the same.
System B also requires an up-front cost of $100,000, after which
it...
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