EBK UNDERSTANDING OUR UNIVERSE (THIRD E
EBK UNDERSTANDING OUR UNIVERSE (THIRD E
3rd Edition
ISBN: 9780393631760
Author: Blumenthal
Publisher: VST
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Chapter 1, Problem 39QAP

(a)

To determine

The time required by light to travel from the Sun to Pluto.

(b)

To determine

The problems occurred during conversation between Earth and spacecraft orbiting Pluto.

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While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. The moon orbits the planet every 7.35 hours with the centers of the two objects separated by a distance roughly 2.25 times the radius of the planet. Fellow scientists speculate that the planet is made of mostly iron. In fact, the media has dubbed it the ''Iron Planet'' and NASA has even named it Planet Hephaestus after the Greek god of iron. But you have your doubts. Assuming the planet is spherical and the orbit circular, calculate the density of Planet Hephaestus.
Suppose you send a probe to land on Mercury, and the probe transmits radio signals to earth at a wavelength of 52.0000 cm. You listen for the probe when Mercury is moving away from Earth at its full orbital velocity of 48 km/s around the Sun. What wavelength (in cm) would you have to tune your radio telescope to detect that signal? Use the doppler shift formula  Note: the speed of light is 3.0 ✕ 105 km/s. Give your answer to at least four decimal places.)
There is one part to this question. I need to know the cm. Thank you!
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