Blow on your hand and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is
A) still warm.
B) cool.
C) neither of these
Answer: B
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A Ping-Pong ball moving East at a speed of 4 m/s collides with a stationary bowling ball. The Ping-Pong ball bounces back to the West, and the bowling ball moves very slowly to the East
Which object experiences the greater magnitude impulse during the collision? A) Neither; both experienced the same magnitude impulse. B) It's impossible to tell since the velocities after the collision are unknown. C) the bowling ball D) the Ping-Pong ball
Fusion occurs in __________ numbers of atomic mass nuclei whereas fission occurs in ___________ numbers of atomic mass nuclei up to _________
a. high, low, uranium b. low, high, uranium c. high, low, iron d. low, high, iron
The climatic zones of Pangaea ranged from
A) glaciation in the south, and a mild temperate climate in the north. B) cold, dry temperatures in the north, and warm, tropical temperatures in the south. C) humid uplands in the north, and drier, desert like conditions in the south. D) widespread glaciation in the north, and a warm, tropical climate in the south.
A thin layer of oil floats on a water puddle. An observer sees a colored pattern. This happens because
A. water transmits light and never reflects light. B. sunlight's frequency range shifts to infrared at the boundary of water and oil. C. two surfaces each transmit some light and reflect some light. D. oil always does this, even if it is not on water.