Germanium, Ge (number 32), computer chips operate faster than silicon, Si (number 14), computer chips. So how might a gallium, Ga (number 31), chip compare with a germanium chip?
A) A gallium chip would be even faster because the gallium is more metallic.
B) A gallium chip would be slower because its electrons are more loosely held.
C) Gallium is located just below aluminum, which is widely known to be an electrical insulator.
D) Gallium is more nonmetallic and so it does not conduct electrons very well.
Answer: A
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Protoplanets
a. grew in size primarily by accretion. b. grew in size primarily by condensation. c. are still visible today as the terrestrial planets. d. grew in size by collecting the particles in the solar wind. e. grew in size by the collision and coalescing of planetesimals.
Energy and Mass: A 1.0-kg aluminum ingot is heated from 0°C to 100°C. By what amount does its mass change? The specific heat of aluminum is 900 J/kg ? K. (c = 3.0 × 108 m/s)
A. Its mass does not change. B. Its mass increases by 0.50 × 10-12 kg C. Its mass decreases by 0.50 × 10-12 kg D. Its mass increases by 1.0 × 10-12 kg E. Its mass decreases by 1.0 × 10-12 kg
A meteor shower occurs when the leftover debris of a(n) ________ intersects with our atmosphere to produce the beautiful streaks of light.
A. asteroid belt B. star C. planet D. comet
An ant walks down the surface of a ball. If the ant begins to slip when the normal force is less than one-third of the ant's weight, at what angle, measured from the top of the ball, does the ant begin to slip?
A) 70.5° B) 19.5° C) 55.0° D) 18.4° E) 35.2°