Homework Statement
A long, thin, straight wire of length L has a positive charge Q distributed uniformly along it. Use Gauss' Law to show that the electric field created by this wire at a radial distance r has a magnitude of E = λ/(2πεor), where λ = Q/L. (Hint: For a Gaussian surface, use a...
Homework Statement
Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge, and in an instrument that measures magnitude and direction of the force exerted by object by the field.
(a) The object has a charge of +20.0 C, and...
Homework Statement
The following table shows the daily high tem-
peratures for a week in May. Determine the
change in temperature each day.
Sun. 76◦
Mon. 72◦
Tues. 80◦
Wed. 75◦
Thurs. 75◦
Fri. 74◦
Sat. 78◦
Find the net change in temperature (the...
Homework Statement
A weather balloon is designed to expand to
a maximum radius of 30 m when in flight at
its working altitude where the air pressure is
0.033 atm and the temperature is 95 K.
If the balloon is filled at atmospheric pres-
sure and 462 K, what is its radius at lift-off...
So, d = P X MM/RT
d = (0.7 atm)(20 g/mol)/(8.31 J/mol*K)(200 K)
d= 0.008423586
2 L * 0.008423586 = 1.684717208E-5 kg
KE = 1/2(1.68E-5)(499.227 m/s)^2 = 2.09 J (WRONG ANSWER)
AM I USING THE WRONG UNITS OR DID I DO A MATH ERROR???
Homework Statement
The internal energy of a monoatomic ideal gas such as neon is simply the total kinetic energy of all its atoms.
What is the internal energy of 2 liters of neon at a temperature of 200 K and pressure of 0.7 atm?
Homework Equations
PV = nRT
KE(ave) = 3/2kT
U =...
Homework Statement
A car tire gauge is used to fill a tire to a gauge pressure of 42.5 lb/in2 on a cold morning when the temperature is -16 C. Atmospheric pressure is 14.7 lb/in2 and 0 C = 273 K.
What would the tire gauge read when the tire has been heated up to 44.2 C?
Homework...