There are two important isotopes of uranium, U 235 and U 238 ; these isotopes are nearly identical chemically but have different atomic masses. Only U 235 is very useful in nuclear reactors. Separating the isotopes is called uranium enrichment (and is often in the news as of this writing, because of concerns that some countries are enriching uranium with the goal of making nuclear weapons.) One of the techniques for enrichment, gas diffusion, is based on the different molecular speeds of uranium hexafluoride gas, UF 6 . (a) The molar masses of U 235 and U 238 F 6 are 349.0 g/mol and 352.0 g/mol, respectively. What is the ratio of their typical speeds v r m s ? (b) At what temperature would their typical speeds differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?
There are two important isotopes of uranium, U 235 and U 238 ; these isotopes are nearly identical chemically but have different atomic masses. Only U 235 is very useful in nuclear reactors. Separating the isotopes is called uranium enrichment (and is often in the news as of this writing, because of concerns that some countries are enriching uranium with the goal of making nuclear weapons.) One of the techniques for enrichment, gas diffusion, is based on the different molecular speeds of uranium hexafluoride gas, UF 6 . (a) The molar masses of U 235 and U 238 F 6 are 349.0 g/mol and 352.0 g/mol, respectively. What is the ratio of their typical speeds v r m s ? (b) At what temperature would their typical speeds differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?
There are two important isotopes of uranium,
U
235
and
U
238
; these isotopes are nearly identical chemically but have different atomic masses. Only
U
235
is very useful in nuclear reactors. Separating the isotopes is called uranium enrichment (and is often in the news as of this writing, because of concerns that some countries are enriching uranium with the goal of making nuclear weapons.) One of the techniques for enrichment, gas diffusion, is based on the different molecular speeds of uranium hexafluoride gas,
UF
6
. (a) The molar masses of
U
235
and
U
238
F
6
are 349.0 g/mol and 352.0 g/mol, respectively. What is the ratio of their typical speeds
v
r
m
s
? (b) At what temperature would their typical speeds differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?
A fluid with density 263 kg/m3 flows through a pipe of varying diameter and height. At location 1 the flow speed is 13.5 m/s and the diameter of the pipe is 7.4 cm down to location 2 the pipe diameter is 16.9 cm. Location 1 is 6.3 meters higher than location 2.
What is the difference in pressure P2 - P1?
Using units in Pascals and use g = 9.81 m/s2.
The kitchen had a temperature 46 degrees Fahrenheit and was converted it to Kelvin. What is the correct number for this temperature (46 F) on the Kelvin scale?
Water is traveling at a speed of 0.65 m/s through a pipe with a cross-section radius of 0.23 meters. The water enters a section of pipe that has a smaller radius, only 0.11 meters. What is the speed of the water traveling in this narrower section of pipe?
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