Why is Venusian lava less viscous than Earth's?
A. There is more water in Earth's lava.
B. Earth's rapid rotation stirs its lava, making it thinner.
C. Earth's surface has a lower temperature.
D. Atmospheric pressure on Venus is much higher than on Earth.
Answer: A
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In an electromagnetic wave, the electric and magnetic fields are oriented such that they are
A) parallel to one another and perpendicular to the direction of wave propagation. B) parallel to one another and parallel to the direction of wave propagation. C) perpendicular to one another and perpendicular to the direction of wave propagation. D) perpendicular to one another and parallel to the direction of wave propagation.
In one-dimensional motion where the direction is indicated by a plus or minus sign, the average velocity of an object has which of the following properties?
a. It is positive. b. It is negative. c. It is zero. d. It can be positive, negative, or zero.
Resistor A has twice the resistance of resistor B. When individually connected across a given potential difference, which one dissipates the most power; and when connected in series across the same potential difference, which one dissipates the most power?
a. A, A b. A, B c. B, B d. B, A
2.50 moles of a monatomic ideal gas expand adiabatically from an initial temperature of 300 K and an initial volume of 80.0 L to a final volume of 150 L. What is the final temperature of the gas?
A) 840 K B) 563 K C) 426 K D) 287 K E) 197 K