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A particularly talkative extraterrestrial (El') civilization lives on a planet that orbits a star at a distance of 1.542 x 1014 km from Earth. Imagine they send out a radio signal tuned to a frequency of 1.5 x 108 Hz that is detected at the 305-m Arecibo radio telescope in Puerto Rico (an aerial view is shown below). The signal has a measured flux of 7 x 10-23 watts/m2. Showing all your calculations, have a go at the following action items:
What is the wavelength of ET's signal?
How long did it take the signal to reach the Earth?
How much energy is associated with the EM waves in ET's signal? Hint: think Max Plank and use h = 6.626 x 10-34 JS.
What is the luminosity of ET's signal, and how does it compare with the Sun's luminosity (hint: divide your answer for the luminosity by L? = 3.85 x 1026 Watts)?
cigarette smoking remains the leading preventable cause of death in the united states causing an estimated 438000
Describe four examples of key energy plans. Assess the main goals of the energy-planning efforts.
1.why are serious reportable events sres important and how is government involved or not involved in sre prevention?2.
hi please find the attached file i need to do paraphrase for this questions answers all answers. make sure that you
Im having trouble diagramming categorical syllogisms under the modern interpretation.
1. a thin cylindrical dipole antenna of radius a and length 1.65l is driven by a time harmonic gap voltage v0. develop
What is (are) the dependent variable?
Purposely ramming the car in front of you while in a traffic jam B.Waiting patiently for turn in a long line C.Sexually propositioning an attractive stranger
Are these classic educational philosophies still relevant? Explain.
What are the assumptions that must be met about her data before she can correctly use an independent t-test to test the hypotheses? Why? How would she see if her data meet these assumptions? How much room does she have to violate any of these assumpt..
A point p is a non-wandering point for f, if , for any open interval J containing p, there exists x ε J and n > 0 such that fn (x) ε J. Note that we do not require that p itself return to J. Let Ω(f) denote the set of non-wandering points for f.
Based on what you know about the function of myelin, why do you think a nerve conduction velocity test is important for diagnosis of Guillain-Barré syndrome
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