If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?
a. Both would be later.
b. Both would be earlier.
c. Sunrise would be later and sunset earlier.
d. Sunrise would be earlier and sunset later.
c
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Power: How many joules of energy are used by a 1.0-hp motor that runs for 1.0 hour? (1 hp = 746 W)
A. 3.6 kJ B. 2.7 MJ C. 45 kJ D. 4.8 J
A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Does E between the plates increase, decrease, or stay the same?
1.increase 2.decrease 3.remains the same
A rocket coasts in an elliptical orbit about Earth. To attain escape velocity using the least amount of fuel in a brief firing time, should it fire off at the apogee, or at the perigee? (Hint: Let Fd = ? KE guide your thinking.)
A) perigee, where it is closest and fastest B) apogee, where it is farthest and slowest C) same at either location D) same at any location
A galvanometer can be calibrated to measure
A) electric current. B) electric voltage. C) both of these D) none of these