The eccentricity of a perfectly circular orbit is 1
Indicate whether the statement is true or false
FALSE
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The temperature variations of the cosmic microwave background observed by Planck agrees well with our model predictions. This provides persuasive evidence in favor of what?
A) both the Big Bang and inflation B) only the Big Bang, but not inflation C) not the Big Bang, but inflation D) neither the Big Bang nor inflation
In a parallel electric circuit, the voltage
a) is different across each branch of the circuit. b) is the same across all circuit components. c) must vary with time and is called ac. d) must never become negative.
The vertical speed of a projectile
a. is zero b. stays constant c. continuously increases d. continuously decreases e. sometimes decreases and sometimes increases
Of the terrestrial planets, Mars seems most promising to exobiologists
Indicate whether the statement is true or false