Which pulsate faster?
a. lower mass, smaller stars b. higher mass, larger stars
c. dimmer, smaller stars d. brighter, smaller stars
a
RATIONALE: Brighter, smaller stars are like white dwarfs. Dimmer, smaller stars could be M dwarfs, for example. Neither set passes through the instability strip.
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Indicate whether the statement is true or false
The type of energy that a swinging pendulum has at the high point of its swing is
A) thermal. B) kinetic. C) spiritual. D) elastic. E) gravitational.
The gravitational interaction was the first force figured out by scientist Sir Isaac Newton. However,
A. it is not a fundamental force of nature, only a symptom of inertia. B. gravitation has been the hardest force to unite with electroweak and strong nuclear interactions. C. until we can detect gravitational waves, it will remain a mystery. D. it will never be incorporated into a "theory of everything" because it is an attractive force.
Suppose several forces are acting upon a mass m. The in = m refers to
A) any particular one of the forces. B) the vector sum of all the forces. C) the force of friction acting upon the mass. D) the arithmetic sum of all the forces. E) the arithmetic mean of all the forces.