What would happen to a planet's thermosphere and exosphere if the Sun had a higher output of X-rays?
What will be an ideal response?
With greater X-ray output, the thermosphere and exosphere would be warmer.
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First Law of Thermodynamics: A fixed amount of an ideal monatomic gas is maintained at constant volume as it is cooled by 50 K. This feat is accomplished by removing 400 J of energy from the gas. How much work is done by the gas during this process?
A. 0 J B. 400 J C. -400 J D. -200 J E. 200 J
Electric forces within an atomic nucleus tend to
A) hold it together. B) push it apart. C) neither of these
Which of these objects is moving with constant velocity but changing acceleration?
a. a rock dropped from a bridge b. a car going around a banked curve at 40 m/s c. an aircraft being launched off of an aircraft carrier d. an aircraft in a banked turn at 100 m/s
Two capacitors with capacitances of 2.0 ?F and 0.40 ?F, respectively, are connected in series. The system is connected to a 50-V battery. What electrical potential energy is stored in the 2.0-?F capacitor?
a. 2.5E–3 J b. 5.0E–4 J c. 8.3E–5 J d. 6.9E–5 J e. 1.4E–5 J