Evidence for dark matter in our Galaxy comes from
A. distribution of supernovae.
B. orbital periods of stars in the Galaxy.
C. locations of black holes.
D. unexplained energetic events.
E. distribution of nebulae.
Ans: B. orbital periods of stars in the Galaxy.
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A Type II supernova produces a planetary nebula
a. True b. False Indicate whether the statement is true or false
Resistors of 10 ohms, 20 ohms, and 30 ohms are connected in series with a battery. The 10 ohm resistor is closest to the positive terminal and the 30 ohm resistor is closest to the negative terminal. What happens as the current flows through this circuit?
A. The most current is consumed in the 10 ohm resistor, less in the 20 ohm resistor, and the least in the 30 ohm B. A little current is consumed in the 10 ohm resistor, more in the 20 ohm, and the most in the 30 ohm C. None of the resistors consume current D. The resistors each consume the same amount of current
Islamic scholars ________.
A. influenced the naming of bright stars B. made detailed studies of the motions of the planets C. developed algebra D. studied and expanded upon older texts in astronomy E. All of these choices are correct.
A container of ideal gas at STP undergoes an isothermal expansion and its entropy changes by 3.66 J/°K. How much work does it do?
What will be an ideal response?