Consider a bright star in our night sky. Assume its distance from Earth is 31.7 light-years...
Consider a bright star in our night sky. Assume its distance from Earth is 89.1 light-years (ly) and its power output is 4.00 ✕ 1028 W, about 100 times that of the Sun. One light-year is the distance traveled by light through a vacuum in one year. (a) Find the intensity of the starlight at the Earth. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. W/m2 (b) Find the...
The light at the Earth from a certain star has an intensity of about 80.5×10-8W/m2. If the star emits radiation with the same power as our Sun, how far away is it from Earth? NOTE: Use 1000 W/m^2 as the intensity of the Sun at the Earth!
The light at the Earth from a certain star has an intensity of about 83×10-8W/m2. If the star emits radiation with the same power as our Sun, how far away is it from Earth? NOTE: Use 1000 W/m^2 as the intensity of the Sun at the Earth!
Problem S The intensity of Sun light on Earth is 1370 W/m. The distance from Mars to the Sun is 15 times larger than the distance from Earth to the Sun If the distance from Mars to the Sun is 1.5 times larger than the distance from Earth to the Sun. What is the intensity of Sun light on Mars? a) ce from Earth to the Sun is 1.5 x 10 m. What is the power output of the Sun?
A star is 14.7 ly (light-years) from Earth. (a) At what constant speed (in m/s) must a spacecraft travel on its journey to the star so that the Earth–star distance measured by an astronaut onboard the spacecraft is 4.46 ly? m/s (b) What is the journey's travel time in years as measured by a person on Earth? yr (c)What is the journey's travel time in years as measured by the astronaut? yr
You travel to a star 195 light-years from Earth at a speed of 2.90*10^8m/s . What do you measure this distance to be? units ly
I4 You travel to a star 185 light-years from Earth at a speed of 2.90×108 m/s . Part A What do you measure this distance to be? l = ??? ly
9. How could you say if a bright spot in the night sky is a planet? murt n omlca ked raths a) from its size d) there is no way to say c) from its location b) from its brightness e) none of the above answers is correct 0. The geological changes of the earth is mainly due to the a) influence of the sun c) influence of the Zodiac b) influence of the moon e) none of the above...
The distance from Earth of the red supergiant Betelgeuse is approximately 643 light-years. If it were to explode as a supernova, it would be one of the brightest stars in the sky. Right now, the brightest star other than the Sun is Sirius, with a luminosity of 26LSun and a distance of 8.6 light-years. How much brighter in our sky than Sirius would the Betelgeuse supernova be if it reached a maximum luminosity of 1.1×1010 LSun? Express your answer using...
PLEASE ANSWER BOTH!!! Our best measurements from Earth indicate that the star system Alpha Centauri is 4.2 light-years away. Suppose some of our astronauts traveled there at a speed v 0.83c. What would the astronauts measure as the distance to Alpha Centauri? O 2.8 light-years 9.1 light-years O 2.9 light-years O 2.3 light-years O 7.5 light-years If a proton with mass 1.67 x 10"27 kg moves in an accelerator such that its total energy is five times its rest energy...