A spring scale typically indicates the magnitude of the tension force exerted on its bottom hook. What will the scale read in each of the cases shown in the diagram?
A. 49 N
B. 98 N
C. 196 N
D. Other (specify
B. 98 N
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What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire B) a boundary between rocks containing the oldest life and older rocks that contained no life C) a boundary between the Earth's crust and the molten rock beneath it D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
A series RLC circuit has an impedance of 120 ? and a resistance of 64 ?. What average power is delivered to this circuit when Vrms = 90 volts?
a. 36 W b. 100 W c. 192 W d. 360 W e. 12 W
In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the
A) number of ejected electrons. B) velocity of ejected electrons. C) both of these D) neither of these
A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. How far away from the table does the ball land? Note: g = 9.8 m/s2 and air resistance is negligible
a. 0.054 m c. 1.2 m b. 0.072 m d. 1.9 m