91影视

A hollow aluminum sphere with outer diameter 10.0 cm has a

mass of 690 g. What is the sphere鈥檚 inner diameter?

What volume of aluminum has the same number of atoms as 10 cm3 of mercury?

The temperature increases from 300 K to 1200 K as a gas undergoes

the process shown in FIGURE Q18.11. What is the final

pressure?

At what temperature does the numerical value in 掳F match the numerical value in 掳C?

A student is asked to sketch a pV diagram for a gas that goes

through a cycle consisting of (a) an isobaric expansion, (b) a

constant-volume reduction in temperature, and (c) an isothermal

process that returns the gas to its initial state. The student draws

the diagram shown in FIGURE Q18.12. What, if anything, is wrong

with the student鈥檚 diagram?

A demented scientist creates a new temperature scale, the 鈥淶 scale.鈥� He decides to call the boiling point of nitrogen 0掳Z and the melting point of iron 1000掳Z.

a. What is the boiling point of water on the Z scale?

b. Convert 500掳Z to degrees Celsius and to kelvins.

A concrete bridge is built of 325-cm-long concrete slabs with an expansion joint between them. The slabs just touch on a ${115}^{0}F$day, the hottest day for which the bridge is designed. What is the gap between the slabs when the temperature is $0^{0}F$?

A surveyor has a steel measuring tape that is calibrated to be 100.000 m long (i.e., accurate to$卤1mm$) at $20掳C$. If she measures the distance between two stakes to be 65.175 m on a $3掳C$day, does she need to add or subtract a correction factor to get the true distance? How large, in mm, is the correction factor?

Two students each build a piece of scientific equipment that uses a 655 mm-long metal rod. One student uses a brass rod, the other an invar rod. If the temperature increases by $5.0掳$C, how much more does the brass rod expand than the invar rod?

A 60.00 L fuel tank is filled with gasoline on a 鈥�$10掳C$day, then rolled into a storage shed where the temperature is $20掳C$. If the tank is not vented, what minimum volume needs to be left empty at filling time so that the tank doesn鈥檛 rupture as it warms?