In an RL circuit, which of the following is a possible magnitude of a phase angle?
a. 45°
c. 225°
b. 315°
d. 135°
A
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Stars in the same constellation
a. probably formed at the same time. b. must be part of the same cluster of stars in space. c. must have been discovered at about the same time at the same location in space. d. may actually be very different distances away from the observer and from each other.
Simple Harmonic Motion: A 0.25 kg harmonic oscillator has a total mechanical energy of 4.1 J. If the oscillation amplitude is 20.0 cm, what is the oscillation frequency?
A. 4.6 Hz B. 1.4 Hz C. 2.3 Hz D. 3.2 Hz
The mass of a galaxy can be estimated using Newton's modification of Kepler's Third law.
Answer the following statement true (T) or false (F)
Which involves a larger number of calories?
A) the condensation of 1 gram of steam at 100°C to water at 100°C B) the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute zero C) both the same D) none of these