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The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3, and the latent heat of fusion of water is 3.35 x 105 J/kg. The driver of the van turns on the rear-window defroster, which operates at 12 V and 27 A. The defroster directly heats an area of 0.59 m2 of the rear window. What is the maximum thickness of ice above this area that the defroster can melt in 4.3 minutes?
A blue car with mass mc = 547 kg is moving east with a speed of vc = 19 m/s and collides with a purple truck with mass mt = 1327 kg that is moving south with an unknown speed. FIND the magnitude of the initial momentum of the truck
A rope is pulling a 25.5 kg mass along a horizontal surface. Find the tension in the rope required to accelerate the mass from 2.44 m/s to 8.33 m/s in 6.22 seconds
Two girls are sitting on the same side of a see-saw. One girl is 28 kg and sitting 2.4 m away from the middle. The other girl is 35 kg and 2.6 m away from the middle. Their dad can balance them out if he sits 2.0 m away from the middle on the other s..
A solenoid is 8.93 cm long, 1.56 cm in diameter, and has 310 turns. find the magnetic flux through one turn of the solenoid
a 4.6kg sphere made of metal whose density is 3800kg/m^3, is suspended by a cord. What fraction of the volume of the sphere is submerged
The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. What is the angular separation between the red and violet components of the spectrum that emerges from the glass
The one-dimensional parity operator pi is defined by pi psi (x) = psi (-x) In other words, pi changes x into –x everywhere in the function. Is pi a Hermitian operator? For what potentials V(x) is it possible to find a set of wavefunctions which are e..
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
a rocket is launched vertically up with no initial velocity. propulsion is provided by the ejection of mass with
A 51.5 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.110 m/s. How much work must be done to stop it
the radius of curvature of the cornea is typically 7.7 mm. if we construct a lens with this radius of curvature on one
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