Which of the following is not an observed pattern of motion in our solar system?
A) Most planets orbit the Sun at the same speed.
B) All planets orbit the Sun in the same direction.
C) Most planetary orbits lie nearly in the same plane.
D) Most planets rotate in the same direction in which they orbit.
E) Almost all moons orbit their planet in the same direction as the planet's rotation.
A) Most planets orbit the Sun at the same speed.
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A horizontal force of magnitude 6.5 N is exerted tangentially on a Frisbee of mass 32 grams and radius 14.3 cm. Assuming the Frisbee, a uniform disk, is originally at rest and the force is exerted for 0.08 s, determine the angular velocity of rotation about the central axis when the Frisbee is released.
What will be an ideal response?
An ideal diode in an ac circuit
A. doubles the current. B. halves the current. C. permits the current to flow in only one direction. D. permits the current to flow in one direction and double the current to flow in the other. E. permits the current to flow in one direction and half the current to flow in the other.
Before a thunder storm, clouds in the sky likely become
A) conducting. B) polarized. C) grounded. D) a field-free region.
An electron and a positron (antielectron), both nearly at rest, collide. What particle(s) is(are) produced?
a. One photon of energy 1.02 MeV b. Two photons of energy 511 keV c. A pi-meson d. A K-meson and an anti-neutrino