A system has an increase in internal energy of 60 J while 90 J was removed from the system by heat. How much work was involved during this process and was it done on the system or done on its environment?
a. 30 J on the system b. 30 J on the environment
c. 150 J on the system d. 150 J on the environment
c
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Carbon-14 dating can reliably date ancient archeological samples up to approximately how many years?
A) 100 million B) 50 thousand C) 5 million D) 10 billion E) 5 thousand
A thin cylindrical shell is released from rest and rolls without slipping down an inclined plane that makes an angle of 30° with the horizontal. How long does it take it to travel 3.1 m?
A) 1.4 s B) 1.1 s C) 2.1 s D) 1.6 s E) 1.8 s
Air can be compressed easily because there is a great deal of empty space between air molecules
Indicate whether the statement is true or false
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be 3 times the change in length of the Pyrex glass rod
Indicate whether the statement is true or false