Suppose it takes 6 seconds for a watermelon to fall to the ground after being dropped from a tall building
If there were no air resistance, so that the watermelon would fall with the acceleration of gravity, about how fast would it be going when it hit the ground?
Since the acceleration of gravity is about 10 m/s2, the watermelon gains 10 m/s of speed every second it is in the air. Therefore, the watermelon would be going 60 m/s when it hit the ground.
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The alpha process tends to produce chiefly:
A) only carbon. B) stable elements. C) even numbered elements. D) odd numbered elements. E) only radioactive elements.
Compounds:
a. always have the same major characteristics as their component elements. b. never have the same major characteristics as any of their component elements. c. often consist of a single element. d. are often surprisingly different from their component elements. e. have characteristics that can be easily predicted if you know the component elements.
A force of stretches a very light ideal spring from equilibrium. What is the force constant (spring constant) of the spring?
A) 41 N/m B) 22 N/m C) 34 N/m D) 46 N/m
According to the shell model, how many shells are required to describe the periodic table?
A) one B) seven C) eight D) eighteen