Which of the following statements does not use the term light-year in an appropriate way?
A) It will take me light-years to complete this homework assignment.
B) It's about 4 light-years from here to Alpha Centauri.
C) A light-year is about 10 trillion kilometers.
D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.
E) The Milky Way Galaxy is about 100,000 light-years in diameter.
A
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Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle with a radius of 600 m. At the bottom of the dive, the speed of the airplane is 150 m/s. What is the apparent weight of the 70.0-kg pilot at that point?
A) 3310 N B) 686 N C) 2630 N D) 489 N E) 1370 N
In the first law of thermodynamics, Q is the heat gained by the system, that is, Q is positive if the system gains heat
Indicate whether the statement is true or false
Which of the following transitions in hydrogen from an initial state (ni) to a final state (nf) results in the most energy emitted?
a. ni = 80, nf = 2 b. ni = 3, nf = 95 c. ni = 2, nf = 1 d. ni = 1, nf = 3
State the scale of your topographic map in units of inches per mile; that is, one inch equals how many miles?