Three satellites are launched into space connected together. Once in deep space, an explosive charge separates the three satellites and they move apart. The satellites each have different masses with m1 < m2 < m3 . Which of the following statements is always true?
a. The one with mass m1 receives the greatest impulse.
b. The one with mass m3 receives the greatest impulse.
c. The all must receive equal impulses.
d. Although one or more of the above statements could be true in special cases, they are not always true.
d
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You have a set of 14 metal weights strung together by nylon fishing line at equal intervals. Each has a weight of 0.20 N. You suspend this array from the ceiling.
Which part of the array has the greatest tension in the fishing line?
A. Between weights 1 and 3 B. Above weight 1 C. Just above weight 14 D. Exactly at weight 7
A 12.0 V battery is placed across a 4.00
resistor. If the current through the resistor is 2.80 A, what is the terminal voltage of the battery?
A. 12.0 V B. 12.8 V C. 11.6 V D. 11.2 V E. 9.6 V
Which kind of object is the best standard candle for measuring distances to extremely distant galaxies?
A. a white dwarf. B. a Cepheid variable star. C. a white dwarf supernova.
Projectile Motion: A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A. 6.1 m/s B. 7.4 m/s C. 8.1 m/s D. 8.9 m/s