The statue of liberty is made of copper that has turned green because it has undergone a change. what can be said about this change?
a. the change is a physical change because the copper in the statue is still there
b. the change is a physical change because a new chemical is formed on the outside of the statue
c. the change is not a physical change because the color of the statue has changed
d. the change is not a physical change because a new chemical is formed on the outside of the statue

Which of the following would not be taken into consideration when describing the quality of a sound

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc