Select the correct equations that show that a freely falling rock drops a distance of 80 m when it falls from rest for 4 s .
Answer: s=g?t2/2=(10m/s2)?(4s)2/2=80m
Physics & Space Science
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Our Sun will likely die as a Type I supernova in about five billion years
Indicate whether the statement is true or false
Physics & Space Science
Newton's Second Law in 1 Dimension: During a hard stop, a car and its passengers slow down with an acceleration of 8.0 m/s2. What magnitude force does a 50-kg passenger exert on the seat belt in such a stop?
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Which of the following is not caused by side branches on a polymer?
(a) Decreased density (b) Decreased transparency (c) Decreased crystallinity (d) Decreased hardness
Physics & Space Science
Who discovered the period-luminosity relationship, and why was it so critical?
What will be an ideal response?
Physics & Space Science