Which of the following is a consequence of the discovery of hot Jupiters for the nebular theory of solar system formation?
A) It has been discarded.
B) It has been modified to allow for the formation of gas giants within the frost line.
C) It has been modified to allow for planets to migrate inwards or outwards due to gravitational interactions.
D) Its status is unclear and awaits further observations that will determine whether hot Jupiters are dense Earth like planets or gas giants.
E) It remains unchanged as it only needs to explain our Solar System.
C
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A. 0.022 N/m B. 0.045 N/m C. 0.17 N/m D. 0.26 N/m
A 300-g glass thermometer initially at 25°C is put into 200 cm3 of hot water at 95°C. Find the final temperature (in °C) of the thermometer, assuming no heat flows to the surroundings. (The specific heat of glass is 0.2 cal/g/°C.)
a. 52 b. 68 c. 89 d. 79 e. 36
When Mars is located directly behind Earth with respect to the Sun in its orbit, it is
a. at the midpoint in the sky between east and west at sunset. b. at the midpoint in the sky between east and west at midnight. c. at the midpoint in the sky between east and west at sunrise. d. at the midpoint in the sky between east and west at noon. e. not visible in the night sky.
An object is being acted upon by three forces and moves with a constant velocity. One force is 60.0 N along the x-axis, the second is 75.0 N along a direction making a counterclockwise angle of 150.0° with the x-axis
What is the magnitude of the third force? A) 37.8 N B) 62.4 N C) 67.5 N D) 130 N E) 135 N