B An enclosed pendulum is not acted on by air resistence or gravity. Plus, pendulum's in clocks are electronic (I think) so that's why it keeps moving back in forth. (at least i think so)
The answer is false because receiving an electrical shock is not an example of a negative punishment if you forget to turn off the power.
Chemical equilibrium is the point at which the forward reaction rate and the reverse reaction rate are <u>identical</u>.
Answer: -
405 mL
Explanation: -
Initial Pressure P 1 = 0.6 atm
Final Pressure P 2 = 0.2 atm
Initial volume V 1 = 135 mL
Using Boyle's Law,
At constant temperature,
P 1 x V 1 = P 2 x V 2
0.6 atm x 135 mL = 0.2 atm x V 2
Final volume = V 2 = 
= 405 mL
Thus if a sample of gas has a volume of 135 ml at 0.600 atm. 405 mL would be the volume if the pressure is decreased to 0.200 atm while temperature is held constant.