Which of the following patterns in the Milky Way structure is consistent with the idea that the Milky Way has not suffered a major collision with another massive galaxy?
A) The halo is full of old stars orbiting in many different directions.
B) Globular clusters are compact groups of thousands of stars.
C) The disk is composed of stars of many different ages.
D) The disk is composed of stars orbiting in the same plane, same direction.
D
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A balloon containing 2.0 m3 of hydrogen gas rises from a location at which the temperature is 22°C and the pressure is 101 kPa to a location where the temperature is -39°C and the pressure is 20 kPa
If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure, what is the new volume of the balloon? A) 4.0 m3 B) 6.0 m3 C) 8.0 m3 D) 10 m3 E) 12 m3
A 4.0-mF capacitor initially charged to 50 V and a 6.0-mF capacitor charged to 30 V are connected to each other with the positive plate of each connected to the negative plate of the other. What is the final charge on the 6.0-mF capacitor?
a. 20 mC b. 8.0 mC c. 10 mC d. 12 mC e. 230 mC
If a battleship sinks in a canal lock, the water level in the lock will
A) rise. B) fall. C) remain unchanged.
According to current understanding, how did the first generation of stars differ from stars born today?
A) They contained much more hydrogen and helium than stars born today. B) They were much cooler in temperature than most stars born today. C) They were much more likely to be members of binary star systems than stars are born today. D) They were much more massive than most stars born today.