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Calculate (a) the entropy of vaporization of methanol at this temperature and (b) the entropy change of the surroundings.
At what speed must you rotate this coil in order to induce an alternating emf of amplitude 11.00 V between the ends of the wire? Give you answer in rev/s. Do not enter the units.
What is the speed V-final of the electron when it is 10.0cm from charge 1? Express your answer in meters per second.
Assume that all gases are perfect and that data refer to 298.15 K unless otherwise stated. Calculate delta H and Delta Stot when two iron blocks, each of mass 1.00 kg one at 200 deg C and the other
Assume also that the rope is long enough to allow the crate to hit the ground before the crewman slides over the side of the cliff. Also, at what speed will the crewman hit the bottom of the ravine?
A beam of electron is that through a small hole into vacuum between two parallel plates wich are separated by a distance D=2.5 cm. A voltage V= 500 volts is applied across the plate, with the far o
Using the expression relating the rate at which current changes in an inductor to the voltage produced at it, find the voltage across the inductor when a switch supplying 2.2 A to a 3.8 mH inductor
Two force vectors act on an object: i) 60.0 Newton at 45.0° north of east and ii) 25.0 Newton at 30.0° south of east. Find the magnitude of the resultant force and its direction?
Two ropes pull on the ring shown. The net force action on the ring is 205 N directly upward. What are the magnitudes of the two tension forces of the rope? 45 degree and 30 degree angles pulling aga
There is a pipe that is 120 inches in length and 12 inches in diameter and with a pressure of 10 psi air is pushed through the pipe. How would I calculate the air flow rate per second with the infor
A spring-loaded gun, fired vertically, shoots a marble 5.2 straight up in the air. What is the marble's range if it is fired horizontally from 1.3 above the ground?
Riders on a Ferris wheel move in a circle with a speed of 4.50. As they go around, they experience a centripetal acceleration of 2.40 . What is the diameter of this particular Ferris wheel?
The spring first slows the car down to rest and then launches it back in the direction from which it came but with a speed of 3.00 m/s. Find the work done by friction in this process.
When you shine the laser pointer and the sample's emission spectrum directly on the grating at the same time, you notice that the fourth peak for the unknown wavelength exactly corresponds with the
A new material for possible use in photovoltaic cells has an energy gap (Eg) of 1.06 eV. What is the maximum wavelength in meters that would work for light on such a photo-cell?
Calculate the first and second order angles for light of wavelength 675 nm for a diffraction grating contains 8,000 lines/cm. i. First, what is the separation between the slits
A 2.0 mm diameter gold ball is charged to +56 nC. What fraction of its electrons have been removed? The density of gold is 19,300 kg/m3.
A wave on a string is described by D(x,t) = (2.00cm)( sin[ (12.57rad/m)x - (638 rad/s)t ] ), where x is in meters and t is in seconds. The linear density of the string is 5.00g/meter. What are: a) t
A cosmic ray muon with the same charge as an electron and a mass of 1.9 10-28 kg is moving directly down toward Earth's surface with a speed of 4.7 107 m/s. What is the magnitude and direction of th
All four wires carry the same magnitude of current I = 10.7 A in the directions indicated. Find the magnetic field at point P, the midpoint of the top side of the square. we need to find magnitude a
A parallel-plate capacitor has circular plates of 8.90 cm radius and 1.70 mm separation. (a) Calculate the capacitance.
The wires are 0.10 m apart, and the sum of the magnetic force and gravitational force on the upper wire is zero. Find the current in the wires. ( Neglect Earth's magnetic field.)
As part of a safety investigation, two 1900kg cars traveling at 24m/s are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and takes
(a) Two forces are given as A= 2N and B= 3N. The angle between the two forces = 110 degrees. Find the magnitude of the resultant of the two forces. (b) FInd the angle, corresponding to the resultant
He can accelerate from rest to a top speed of 7.9 m/s in 7.30 seconds. (a)Where does the ball land? ? m, at an angle of ? degrees off the 1st baseline. (b)Does he catch the ball? No? Not enough info