How would the atmospheric temperature structure differ from the generic structure if a planet had no greenhouse gases?
What will be an ideal response?
With no greenhouse gases, the troposphere would not be warmer at the bottom.
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According to Galileo, the acceleration of a freely falling object due to gravity is ____
a. larger if the object is dropped from a greater height b. smaller if the object is dropped from a greater height c. larger if the mass of the object is larger d. smaller if the mass of the object is larger e. the same regardless of the mass and the height from which it is dropped
A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is negative. The sphere is
A. rotating clockwise and slowing down. B. rotating counterclockwise and slowing down. C. rotating clockwise and speeding up. D. rotating counterclockwise and speeding up. E. first rotating counterclockwise and then clockwise.
Motor oil, with a viscosity of 0.25 N ? s/m2, is flowing through a tube that has a radius of 5.0 mm and is 25 cm long. The drop in pressure is 300 kPa. What is the volume of oil flowing through the tube per second?
A) 0.00038 m3/s B) 0.025 m3/s C) 0.0012 m3/s D) 4.7 m3/s E) 7.5 m3/s
Small openings between leaves in a tree act as pinholes. The round spots of light cast on the ground below are images of
A) the Sun. B) the openings themselves. C) both of these D) neither of these