An object moving in simple harmonic motion has an amplitude of 0.0450 m and a maximum acceleration of 40.0 m/s2 . What is the frequency of the system?
a. 14.9 Hz
b. 187 Hz
c. 4.75 Hz
d. 11.9 Hz
e. 1.80 Hz
c
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Star A is a main sequence star of spectral type G5 and star B is a red giant of spectral type K2. Which statement below is correct?
A) Star A appears brighter than star B. B) Star B appears brighter than star A. C) Star A is hotter than star B. D) Star B is hotter than star A. E) None of the above can be said about these two stars.
A wheel (radius = 12 cm) is mounted on a frictionless, horizontal axle that is perpendicular to the wheel and passes through the center of mass of the wheel. A light cord wrapped around the wheel supports a 0.40-kg object. If released from rest with the string taut, the object is observed to fall with a downward acceleration of 3.0 m/s2 . What is the moment of inertia (of the wheel) about the
given axle? a. 0.023 kg/m2 b. 0.013 kg/m2 c. 0.020 kg/m2 d. 0.016 kg/m2 e. 0.035 kg/m2
A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at a certain angle with respect to the magnetic field of strength 0.30 T
If the wire experiences a force of 0.18 N, what angle does the wire make with respect to the magnetic field? A) 20° B) 25° C) 30° D) 35° E) 60°
________ waves cannot travel through the Earth's liquid outer core
Fill in the blank(s) with correct word