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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science