Ellie has a friend, Jack, that lives on a planet orbiting a star that is 20 light years away. On the night of her high school prom when Ellie is 17, she uses a radio telescope to send Jack one of her prom pictures (we will not speculate on her motives). Radio waves travel at the speed of light. Jack gets the picture and immediately uses his own radio telescope to send his own picture of his recent dinner date back to Ellie (again, let's not speculate ...). How old is Ellie when she gets Jack's picture?
Answers: 2
Another question on Physics
Physics, 21.06.2019 15:00
The simple interest on a loan of $200 at 10 percent interest per year is $10 per year until the loan is paid off. $15 per year until the loan is paid off. $20 per year until the loan is paid off. $25 per year until the loan is paid off.
Answers: 2
Physics, 22.06.2019 07:00
The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?
Answers: 3
Physics, 22.06.2019 15:00
Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.
Answers: 1
You know the right answer?
Ellie has a friend, Jack, that lives on a planet orbiting a star that is 20 light years away. On the...
Questions
Mathematics, 13.07.2021 21:50
Mathematics, 13.07.2021 21:50
History, 13.07.2021 21:50
English, 13.07.2021 21:50
Mathematics, 13.07.2021 21:50
Mathematics, 13.07.2021 21:50
English, 13.07.2021 22:00
English, 13.07.2021 22:00
