Rihanna is a singer who came from Barbados, born as Robyn Rihanna Fenty on the 20th of February'88. She moved to the United States when she turned sixteen in order to pursue a career in music, guided by Evan Rogers, a record producer. Rihanna eventually signed a deal with the label: Def Jam Recordings after she passed Jay-Z's auditions.

Rihanna has sold millions of albums all over the world and has been awarded a number of times. Her awards include "World's Best Pop Selling Female Artist" in 2007's World Music Awards, "Favorite Pop/Rock Female Artist" in 2008's American Music Awards, and many other awards. Monica and Ronald Fenty are Rihanna's parents, with Monica being a mixture of Guyanese and Afro blood, while Ronald has Irish and Barbadian blood. When Rihanna reached fourteen years of age, her parents split up. One year later, Rihanna formed a musical group with a couple of her classmates. In the year 2003, Rihanna and the other band members met record producer Evan Rogers who was at that time on vacation in Barbados. Rihanna was the only one who caught the interest of Rogers, taking her to where she is now.

In August of 2005, the Def Jam label launched Rihanna's debut album entitled "Music of the Sun" which made its way to number 10 on the US Billboard 200 chart. To date, Rihanna's first album turned Gold, certified by the Recording Industry Association of America. The album's lead single "Pon de Replay" hit the 2nd spot in Billboard's Hot 100. Another single found in "Music of the Sun" is "If It's Lovin' That You Want", but it was less successful than the lead single. In less than a year, Rihanna introduced her second album entitled "A Girl Like Me" in 2006. It turned platinum and its first single "SOS" topped Billboard's Hot 100. The second single entitled "Unfaithful" also became an international hit. In November 2006 up to February of the following year (2007), Rihanna went on tour with the Pussycat Dolls wherein they performed in the UK. Rihanna's third album was launched in 2007 and it featured other popular artists like Timbaland, Ne-yo, etc. The album was called "Good Girl Gone Bad" and contained some of Rihanna's hit tracks like "Umbrella", "Hate That I Love You", etc. In 2008, Rihanna received her very first Grammy Award: "Best Rap/Sung Collaboration" for her single "Umbrella". She also garnered a number of nominations like Song of the Year and Record of the Year for "Umbrella", Best R&B Song for "Hate That I Love You", and many more.

Read more: http://www.metrolyrics.com/rihanna-biography.html#ixzz0nSmpwmlt

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Lösung: 1. Das Funksignal muss die Strecke von der Erde zum Mars und wieder zurücklaufen. x ist also 2.0⋅108 km. Die Geschwindigkeit mit der das Signal fortschreitet ist 300000 km/s.

v=xt→t=xv

t=(2.0⋅1083.0⋅105) (km ⋅ s)/km =0,66⋅103s=11min

Die Antwort auf die von der Erde abgeschickte Frage trifft also frühestens nach 11 Minuten auf der Erde Achtung 108 oben im Text ist 10 hoch 8

schau hier nach http://forum.mathematik-physik.net/viewtopic.php?f=31&t=39

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In der Zwiebel lagert der Zellkern, in dem Blätter, Stängel, Blüten und Samen schon angelegt sind. Dieser wird von fleischigen, Reservestoffe enthaltenden Schalen in mehreren Lagen umhüllt.

Der Aufbau der Knolle ist weniger kompliziert, bei ihnen handelt es sich ausschließlich um Speicherorgane, in denen das meiste von dem enthalten ist, was die Pflanze zum Leben benötigt.

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