The mass of a carbon atom is 2.0×1026kg. a) What is the kinetic energy of a carb
ID: 1424508 • Letter: T
Question
The mass of a carbon atom is 2.0×1026kg.
a)
What is the kinetic energy of a carbon atom moving with a speed of 510 m/s ?
Express your answer to two significant figures and include the appropriate units.
b)
Two carbon atoms are joined by a spring-like carbon-carbon bond. The potential energy stored in the bond has the value you calculated in part A if the bond is stretched 0.050 nm. What is the bond's spring constant?
Express your answer to two significant figures and include the appropriate units.
Explanation / Answer
mass of carbon atom = 2.0*10^(-26) kg
speed = 510 m/s
a)
the kinetic energy of a carbon atom = (1/2)*mv^2
KE = 0.5*2.0*10^(-26)*(510)^2 = 2.6*10^(-21) J
b)
here given is
Potential Energy = Kinetic energy
0.5*kx^2 = KE
0.5*k*(0.05*10^(-9))^2 = 2.6*10^(-21)
k = 2.08 N/m {ANSWER}
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