Most of the new star formation in the Galaxy is found in the
A) halo.
B) spiral arms.
C) bulge.
D) Galactic center.
E) globular clusters.
B
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The focal lengths of the objective lens and the eyepiece of a microscope are 0.50 cm and 2.0 cm, respectively, and their separation is 6.0 cm when adjusted for minimum eyestrain for a person with a near point of 25.0 cm
If the microscope is focused on a small object, the magnitude of its final overall magnification is closest to A) 200. B) 150. C) 50. D) 100. E) 250.
A proton and antiproton each with total energy 300 GeV collide head-on. What is the total energy (particles + energy) released?
a. 600 GeV b. 300 GeV c. zero d. 450 GeV e. 150 GeV
A truck, initially at rest, rolls down a frictionless hill and attains a speed of 20 m/s at the bottom. To achieve a speed of 40 m/s at the bottom, how many times higher must the hill be?
A. half the height B. the same height C. 12 times the height D. twice the height E. four times the height
Contrast main sequence stars of type B and G
What will be an ideal response?