The image of our galaxy in radio emission from carbon monoxide maps the distribution of molecular clouds. Which of the following would give a similar picture of our galaxy?
A) visible light, which is closest to how the night sky appears from Earth
B) 21-cm-line radio emission from atomic hydrogen
C) X-rays from hot gas bubbles in the disk
D) infrared emission from interstellar dust grains
E) visible light, showing the edges of supernova bubbles
D
You might also like to view...
A(n) ________ stage is a relatively gentle mass-loss event which allows a star to peacefully readjust its structure into a white dwarf configuration
Fill in the blank(s) with correct word
A 5.0-kg stone is thrown upward at 7.5 m/s at an angle of 51° above the horizontal from the upper edge of a cliff, and it hits the ground 1.5 s later with no air resistance. Find the magnitude of its velocity vector just as it reaches the ground
What will be an ideal response?
One number has three significant figures and another number has four significant figures. If these numbers are added, subtracted, multiplied, or divided, which operation can produce the greatest number of significant figures?
A. the addition B. the subtraction C. the multiplication D. the division E. All the operations result in the same number of significant figures.
How did Eratosthenes estimate the size of Earth in 240 B.C.?
A) by observing the duration of a solar eclipse B) by measuring the size of Earth's shadow on the Moon in a lunar eclipse C) by comparing the maximum altitude of the Sun in two cities at different latitudes on the summer solstice D) by sending fleets of ships around Earth E) We don't know how he did it since all his writings were destroyed.