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what is the vapor pressure of ethanol at 20 celcius is 44mm, and the vapor pressure of methanol at the same temperature is 94 mm. Assuming an idea solution, what is the vapor pressure of a solution
The lowest pedal note on a particular large pipe organ has a fundamental frequency of 15.7 Hz. What is the length of pipe between the sounding hole and the open end
What is the net charge at neutral pH of a tripeptide containing only alanine? How does the total number of negative and positive charges change following hydrolysis of the tripeptide
A bottle containing 2 kg of water at a temperature of 15°C is placed in a refrigerator where the temperature is kept at 4°C.
It is desired that the extent of disruption be >= 0.9. Plot how the number of passes varies with operating pressure over the pressure range of 50-125 MPa. What pressure range would you probably w
A mine car (mass=490 kg) rolls at a speed of 0.50 m/s on a horizontal track, as the drawing shows. Determine the speed of the car-coal system
A hydrogen atom initially in its ground state absorbs a photon and ends up in the n=6 state. Calculate the energy of the incident photon
A process involves the performance of electrical work in the amount w' on a system. Show that if the process is carried out at constant volume, the heat absorbed is delta U-w'.
A student has a stretched string on density u and length L under a tesnion F. A standing wave of frequency f = 4/4 squareroot, Calculate the length of the string
A photon with an initial wavelength of 1.150×10-11 m Compton scatters from an electron which is initially at rest. What is the energy of the incoming photon
The temperatre result in each measurement are listed below, write down the formula for mean and calculate the temperature mean value
A jet airplane is in level flight. The mass of the airplane is m = 8830 kg. find the magnitude of the lift force acting on the plane
A fixed 17.3-cm-diameter wire coil is perpendicular to a magnetic field 0.49T pointing up. In 0.15s , the field is changed to 0.33T pointing down. obtain the average induced emf in the coil
A meniscus lens is concave on one side and convex on the other. Find the refractive power of a meniscus lens with n = 1.56 and curvature radius 29cm on the convex side and 48cm on the concave side
A 52% efficient device uses chemical energy to generate 570J J of electric energy. How much chemical energy is used
A 1.1 kg birdfeeder hangs from a horizontal tree branch. The birdfeeder is attached to the branch at a point that is 1.0 m from the trunk. where the branch attaches to the trunk
Atmospheric scientists studying clouds in the Marshall Islands have observed what they believe to be the world's largest raindrops, with a radius of 0.52 cm. How many molecules are in these monster
Name the alkyl branch present on the ring of ibuprofen that is across from the acid functional group
The surface waters of tropical oceans are at a temperature of 28?C while water at a depth of 1200 m is at 3?C. What is the maximum efficiency possible of such a heat engine
A process involves the performance of electrical work in the amount w' on a system. Show that if the process is carried out
Napthalene has a log Kow of 3.33. Estimate its soil-water partition coefficient normalized to organic carbon.
An unstable particle with a mass equal to 3.34x10^-27 kg is initially at rest. Find the masses of the fragments
The speed of a photon is 4.5x10^5 ms^-1. If the uncertainty in its momentum is to be reduced to .01 percent, what uncertainty in its location must be tolerated
What is the frequency of blue light that has a wavelength of 450 nm and What is the frequency of red light that has a wavelength of 650 nm
Poorly treated municipal wastewater is dis- charged to a stream. The river flow rate upstream of the discharge point is Qu = 8.7 m3/s. The discharge occursataflowofQd=0.9m3/sandhasaBODcon- centratio