A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg rock to reach the ground?
A) 4T B) T/2 C) T D) 2T E) T/4
C
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Answer the following statement true (T) or false (F)
A girl throws a stone straight down from a bridge. The stone leaves her hand with speed of 8.00 m/s at a height of 12 m above the water below. How much time does it take for the stone to hit the water?
A) 2.58 s B) 0.95 s C) 1.8 s D) 0.41 s E) 17.3 s
A particle confined in a rigid one-dimensional box (an infinite well) of length 17.0 fm has an energy level En = 2.0 MeV and an adjacent energy level En+1 = 37.5 MeV
What is the value of the ground state energy? (1 eV = 1.60 × 10-19 J) A) 1.50 MeV B) 13.5 MeV C) 0.500 MeV D) 4.50 MeV
What does the IUPAC organization do with
regard to organic chemistry? a) predicts new synthetic hydrocarbon structures b) provides rules for naming complex organic compounds c) helps convert unsaturated hydrocarbons into saturated ones d) tests drugs to make sure that they are safe before they are released