If the tilt of Earth's rotation axis was increased from 23.5° to 40°, what would we expect to change?
A) Seasons on Earth would become more extreme (hotter summers, colder winters).
B) Seasons on Earth would become less extreme (cooler summers, warmer winters).
C) The Earth would not experience seasons anymore.
D) Nothing would change about weather on Earth.
A) Seasons on Earth would become more extreme (hotter summers, colder winters).
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In very general terms, how do the temperature structures of the atmospheres of Venus and Mars differ from that of Earth?
A) They lack X-ray absorbing thermospheres. B) They lack ultraviolet-absorbing stratospheres. C) Their atmospheres are similar in structure to Earth's, but with much higher temperatures. D) Temperatures in their tropospheres increase with altitude, rather than decreasing with altitude.
The weight of a 1-centimer cubed metal cube scaled up by a factor of 10 will be
A) ten times as much. B) a hundred times as much. C) a thousand times as much. D) none of the above
A mass of 0.40 kg, hanging from a spring with a spring constant of 75.0 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.20 m
a. zero b. 2.7 m/s c. 3.9 m/s d. 3.4 m/s e. 0.55 m/s
A 22.3-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?
a. 0 J b. 10.8 kJ c. –10.8 kJ d. 11.2 J e. 223 J