Airplane flight best illustrates
A) Archimedes' principle.
B) Pascal's principle.
C) Bernoulli's principle.
D) Boyle's law.
Answer: C
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What drives the motion of the tectonic plates on Earth?
A) convection cells in the mantle B) lava flows in trenches along the sea floor C) the Coriolis force D) Earth's magnetic field E) tidal forces
The Sun's habitable zone
A) extends from some place a little beyond the orbit of Venus to some place near the orbit of Mars. B) consists only of Earth, since Earth is the only planet known to be inhabited. C) extends from the orbit of Earth to the orbit of Jupiter. D) extends from just beyond the orbit of Mercury to just beyond Earth's orbit.
A proton with a kinetic energy of 0.20 keV follows a circular path in a region where the magnetic field is uniform and has a magnitude of 60 mT. What is the radius of this path?
a. 4.1 cm b. 2.9 cm c. 3.4 cm d. 5.1 cm e. 2.4 cm
Power: The voltage drop across a metal bar is 5.0 V while a current of 10.0 mA flows through it. How much power does this bar dissipate?
A. 50 mW B. 500 ?W C. 2.5 kW D. 0.50 kW