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A piece of hot iron (c = 450 J/kg .°C) of mass 0.500 kg and temperature 120° C is dunked into 2.00 liters of water at room temperature (20.0° C)
a. What is the final temperature of the mix?
b. What is the amount of energy transferred by heat from the iron to the water?
c. What are the entropy changes of the water and of the iron?
d. Show that the 2nd law of thermodynamics is not violated in this process
The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.20 m/s2 for 4.05 s, making straight skid marks 61.0 m long, all the way to the tree. With what speed does the car then s..
Explain how the earth’s geomagnetic field is created? Hint: be sure to include thedirection of the earth’s current. Why is Northern Canadabombarded by more intensecosmic radiation (solar wind) than Mexico is? Why do astronauts keep to altitudesbeneat..
Fred (mass 72 kg) is running with the football at a speed of 5.8 m/s when he is met head-on by Brutus (mass 120 kg), who is moving at 4.0 m/s. How far do they slide
An airplane propeller is 2.08 m in length (from tip to tip)with mass 117 kg. The propeller is rotating at 2400 rev/min aboutan axis through its center. What is its rotational kinetic energy
A pair of slits, separated by 0.170 mm, is illuminated by light having a wavelength of ? = 569 nm. What is the path difference for the two slits at the location y
a block of mass m slides down a frictionless plane inclined at an angle with the horizontal. the gravitational force is
A vessel whose walls are thermally insulated contains 2.5 {rm kg} of water and 0.6 {rm kg} of ice, all at a temperature of 0.0 ^circ {rm{C}}. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted ..
A positive charge q is placed at the center of a circular ring of radius R. The ring carries a uniformly distributed negative charge of total magnitude -Qo. If its mass is m, what is its period
The binding energy of a nucleus is 441.3 MeV. What is the mass defect of the nucleus in atomic mass units
A typical red blood cell subtends an angle of only 1.8×10^-5 rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
An electron is moving through a region of space which possessesa uniform electric field and uniform magnetic field. The electricpoint in the positive x direction and has a magnitude of E = 2,500v/m. The magnetic field is pointing in the positive y..
A sinusoidal voltage ?v = (65 V) sin (130t) is applied to a series RLC circuit with L = 10 mH, C = 120 ?F, and R = 50 ?. What is the maximum current in the circuit
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