Homework Statement
If 18.75 mol of helium gas is at 10.0C and a gauge pressure of 0.035atm, calculate a) the volume of the helium gas under these conditions. b) calculate the temp if the gas is compressed to half the voume at a gauge pressure of 1.00atm.
Homework Equations
PV=nRT...
Homework Statement
Calculate the density of Oxygen at STP using the ideal gas law
Homework Equations
PV=nRT
The Attempt at a Solution
n = (X grams Oxygen / 16g/mol Oxygen)
I set V = to 1 m3
P = 1 atm
R = 8.315 J/Mol K
T = 273 K
PV = nRT
PV/RT = n
1/(8.315*273) = X grams...
Thanks tiny-tim!
I used f = (1/2π)(√1/.22kg) = 3.35 Hz
That's a closer answer to the book's 3.8Hz answer. However, by not figuring k using the information that the .60kg weight made the spring oscillate at a frequency of 3Hz, I'm not sure how to use the information about the .60kg weight and...
Homework Statement
An elastic cord vibrates with a frequency of 3.0 Hz with a mass of 0.60kg is hung from it. What is its frequency when only 0.38kg hangs from it?
Homework Equations
freq = (1/2Pi)*sqrt(k/m)
The Attempt at a Solution
freq = 3.0Hz = (1/2Pi)*sqrt(k/0.60kg)
=...
Homework Statement
The springs of a 1500kg car compress 5mm when its 68kg driver gets into the drivers seat. If the car goes over a bump what will be the frequency of the vibrations?
Homework Equations
Spring force = F = -kx
Time = (4pi^2)(m/k)
Freq = 1/T
The Attempt at a...
Homework Statement
A 38.7g box slides down an incline of height 12.5m. As it slides, air resistance does -3.71J of work. Find the speed at which it reaches the bottom of the incline.
Homework Equations
E kinetic at bottom = E potential at top - Work air resistance
1/2 mv2 - 1/2...
Homework Statement
A mass of 225 kg is hung from a metal cable of length 1.60m and diameter 8.20mm. This causes the cable to stretch by an amount 0.668mm. Calculate the Elastic Modulus of the metal.
Homework Equations
E=(F/A)/(change L / orig L)
The Attempt at a Solution
F =...