A cook plugs a 500 W crockpot and a 1 000 W kettle into a 240 V power supply, all operating on direct current. When we compare the two, we find that
a. Icrockpot < Ikettle and Rcrockpot < Rkettle. b. Icrockpot < Ikettle and Rcrockpot > Rkettle. c. Icrockpot = Ikettle and Rcrockpot = Rkettle. d. Icrockpot > Ikettle and Rcrockpot < Rkettle. e. Icrockpot > Ikettle and Rcrockpot > Rkettle.
B
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When an atom emits light, an electron in it moves from a higher to a lower energy level.
Answer the following statement true (T) or false (F)
A diatomic molecule consists of two point masses, m1 and m2, separated by a distance r. Find the moment of inertia through the center of mass about an axis perpendicular to the molecular axis
a. m1m2r2/(m1 + m2) b. [(m1m2/m1) + m2]r2 c. (m1 + m2)/m1m2r2 d. (m1 + m1)r2 /m1m2 e. m1m2r2/m1
A particle (charge = 40 ?C) moves directly toward a second particle (charge = 80 ?C) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped
a. 0.75 m b. 0.84 m c. 0.95 m d. 0.68 m e. 0.56 m
The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the resultant force on this object doing work at t = 1 s?
a. 48 W b. 40 W c. 32 W d. 56 W e. 16 W