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Humans cool off by perspiring; the evaporating sweat removes heat from the body. If the skin temperature is 35.0°C and the air temperature is 15.6°C, what is the entropy change of the universe due to the evaporation of 215 mL of sweat? Take the latent heat of vaporization of sweat to be the same as that for water (Lv = 2,256 J/g). (You may also assume that the density of sweat is equal to that of water.)
The four tires on the author's car are inflated to an absolute pressure of 2.7x10^5 Pa. obtain the contact area between each tire and the ground
Your telescope has an objective lens with a focal length of 0.80m . You point the telescope at the moon, What is the angular magnification of the moon
An infinitely long line of charge has linear charge density 4.00 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 17.0 cm from the line and moving straight toward the line at 3000m/s.
Heat is added to two identical samples of a monatomic ideal gas. In the first sample the heat is added while the volume of the gas is kept constant, By how much does the temperature of this sample increase
Two turning forks oscillating coherently and in phase at 1200Hz are separated by 0.35m, Calculate the angles of minimum intensity
A 0.5-cm-wide diffraction grating has 1315 slits. What are the angles (in degrees) of the first two diffraction orders
You have a parallel-plate ideal capacitor with a capacitance of 23mF that you connect to a 4V battery until it is fully charged. What is the diameter of the solenoid
A grating has 600 rulings per mm and is 6.0 mm wide. What is the smallest wavelenght interval that can be resolved in the third order at ? = 500 nm? How many orders can be seen? Assum normal incidence of light on the grting throughout.
A small bird's wings can undergo a maximum displacement amplitude of 5.1 cm (distance from the tip of the wing to the horizontal). what is the oscillation frequency of the wing tips
A 6.00 kg mass is located at (2.00m, 2.00m, 2.00m) and a 5.00 kg mass is located at (-1.00m, 3.00m, -2.00 m). find the moment of inertia of this system
A hydrogen atom has a single proton at its center and a single electron at a distance of approximately 0.0533 nm from the proton
A 1.6 kg object oscillates with simple harmonic motion on a spring of force constant 400.0 N/m. What is the total energy of the object and the spring
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