What is the angular speed in rad/s of an electric motor that rotates at 1.80 × 103 rpm?
What will be an ideal response?
188 radian/s
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A wire along the z-axis carries a current of 6.8 A in the +z direction. Find the magnitude and direction of the force exerted on a 6.1-cm long length of the wire by a uniform magnetic field with magnitude 0.36 T in the -x direction
What will be an ideal response?
Life probably did not originate on the land surface because
A) impacts would have destroyed any life that appeared B) water was not plentiful on land C) there was no ozone layer to shield out harmful UV rays D) organic materials were not present on the land
The light-gathering power of a telescope is directly proportional to the:
A) square of the diameter of the primary mirror or lens. B) cube of the diameter of the primary mirror or lens. C) square of the focal length of the primary mirror or lens. D) cube of the radius of curvature of the primary mirror or lens.
That matter is composed of quarks was first proposed by
A. Blatt and Weiskopf. B. Gell-Mann and Zweig. C. Rutherford and Geiger. D. Bardeen and Cooper. E. Feynman and Schwinger.