The majority of stars in the Milky Way appear to be in the ________.
A. Sagittarius A* region
B. 6,000 K to 10,000 K temperature range
C. O and B spectral type
D. mass range of 0.1 to 0.5 solar masses
Answer: D
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The magnetism of the Earth acts approximately as if it originates from a huge bar magnet within the Earth. Which of the following statements are true?
A. the north magnetic pole of the Earth is located at the Earth's North Pole B. the south magnetic pole of the Earth is located at the Earth's South Pole C. the Earth's magnetic field is vertical at the equator D. the Earths north magnetic pole is magnetically a south pole E. None of these statements are true.
The density of water at 0°C is 999.84 kg/m3 and at 4°C it is 999.96 kg/m3. A 1.0-liter container, full to the brim with water at 4°C is placed in the refrigerator
By the time that the temperature of the water reaches 0°C, how much of the water has spilled from the container, assuming that the contraction of the container is negligible? A) 1.1 × 10-7m3 B) 1.2 × 10-7m3 C) 1.3 × 10-7m3 D) 1.4 × 10-7m3 E) 1.5 × 10-7m3
Doppler Effect: As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is the speed of the car? The speed of sound in the air is 343 m/s.
A. 26 m/s B. 27 m/s C. 28 m/s D. 29 m/s E. 30 m/s
The coefficients needed to balance the equation Ga + Br2 ? GaBr3 are, respectively,
a. 4, 3, and 2. b. 2, 3, and 2. c. 1, 3, and 2. d. 2, 1, and 2.