What is the likely cause of the haze seen in photographs of Pluto's atmosphere taken by the New Horizons spacecraft?
A) ice particles erupting from geysers on Pluto's surface
B) hydrocarbon molecules captured from passing comets
C) condensation on the camera lens
D) ultraviolet solar radiation breaking down methane and nitrogen molecules
D) ultraviolet solar radiation breaking down methane and nitrogen molecules
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Stars at different distances from the galactic center revolve with different periods, an effect called _______________ rotation
Fill in the blank(s) with correct word
Where have scientists begun a concerted search for life outside of Earth?
A) the Moon B) Venus C) Mars D) Jupiter E) Titan
A garden hose is held at an angle of 50°. Neglecting air resistance, the water will travel exactly the same horizontal distance before returning to the same level if the hose is held at an angle of
1) 40°. 2) 45°. 3) 60°. For maximum range, the hose should be held at 4) 40°. 5) 45°. 6) 55°. 7) 60°.
A ball at the end of a string is swinging as a simple pendulum. Assuming no loss in energy due to friction, we can say for the ball that
A. the kinetic energy does not change but the potential energy does. B. the mechanical energy changes and is maximum where the kinetic energy is minimum. C. the potential energy is maximum at each end of the motion. D. the mechanical energy changes and is maximum where the kinetic energy is maximum.