Is it possible for an object to have a velocity of zero and a numerical value for acceleration? Justify your answer with an example
Yes, a ball thrown upward at its maximum height will have an instantaneous velocity
of zero but will still have an acceleration (due to gravity) of 980 cm s2 .
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The most massive main-sequence stars are the M stars
a. True b. False Indicate whether the statement is true or false
Novae are more closely related to type II than to type I supernovae
Indicate whether the statement is true or false
Characteristic peaks occur in an x-ray spectrum of an atom because electrons in the atom make transitions to lower energy levels after being bombarded with high energy electrons
a. True b. False Indicate whether the statement is true or false
Which of the following is not associated with a cold front?
A) thunderstorms B) drop in air pressure C) gradually rising warm air D) clear skies behind the front