In general, precession results when
A)
torque acts on a body with zero angular momentum.
B)
the direction of torque acting on an object is parallel to the direction of angular momentum of the body.
C)
there is no torque acting on a body.
D)
the direction of torque acting on an object has a component perpendicular to the direction of angular momentum of the body.
E)
the direction of torque acting on an object is opposite to the direction of angular momentum of the body.
D
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The lowest-mass stars cannot become giants because
a. they do not contain helium. b. they rotate too slowly. c. their convective interiors prevent the development of an inert helium core surrounded by unprocessed hydrogen. d. they contain strong magnetic fields. e. they never use up their hydrogen.
Solar activity cannot disrupt communications on Earth
Indicate whether the statement is true or false
In a closed system, the kinetic energy plus the potential energy is a constant
a. True b. False Indicate whether the statement is true or false
Light enters a substance from air at an angle of 32.0°, and continues at an angle of 23.0°. What is the index of refraction of the substance?
A) 0.74 B) 1.11 C) 1.28 D) 1.36 E) 1.52