In the solar nebular theory, the dusty disk condensing around the Sun's equator became the ecliptic plane in which the planets then formed
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TRUE
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Sirius A and Sirius B constitute a binary star pair in which the stars orbit their common center of mass with a period of 49.9 years. The stars are 2.40 × 1012 m apart
Assume that the two stars have equal masses and that they move in a circle about their common center of mass. What is the mass of each star? G = 6.67 x 10-11 N•m2/kg2. A) 5.41 × 1030 kg B) 2.70 × 1030 kg C) 7.55 × 1030 kg D) 3.30 × 1030 kg E) 1.65 × 1030 kg
The light-gathering ability of a telescope is most dependent on the diameter of its primary objective
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An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?
a. 35 m/s b. 25 m/s c. 30 m/s d. 21 m/s e. 17 m/s
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 10^3 kg/m3.)
a. 1.05 cm b. 1.15 cm c. 1.45 cm d. 1.65 cm e. 1.35 cm