The Moon probably formed at the same time that Earth formed, rather like the formation of a double planet
Indicate whether the statement is true or false
FALSE
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Mass on a Spring: An object attached to an ideal spring executes simple harmonic motion. If you want to double its total energy, you could
A. double the amplitude of vibration. B. double the force constant (spring constant) of the spring. C. double both the amplitude and force constant (spring constant). D. double the mass. E. double both the mass and amplitude of vibration.
A step-up transformer in an electrical circuit can step up _______.
(a) Voltage (b) Energy (c) Both of these (d) Neither of these.
The simplest life forms appeared on Earth by the time it was how old?
A) five million years B) one billion years C) 2.5 billion years D) 3.5 billion years E) 4.5 billion years
Perfect absorbers of electromagnetic radiation are also perfect emitters
Indicate whether the statement is true or false