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The human body has a surface area of approximately 1.8 m^2, a surface temperature of approximately 30 degrees celsius , and a typical emissivity at infrared wavelengths of e = 0.97.If we make the approximation that all photons are emitted at the wavelength of peak intensity, how many photons per second does the body emit?
A particular atomic energy state is characterized by a principle quantum number n = 4. How many orbital subshells are possible
An alpha particle (the nucleus of a helium atom, with charge +2 and a mass four times that of a proton), What is the speed of the antiproton when the particles are 1.6 nm apart
As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate, What is the capacitance of the system
A father and a daughter balance a teeter totter
A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.80 cm, Use work and energy considerations to find the average frictional force that stops the bullet
Two converging lens with a focal lengths of 10 cm are separated by 10 cm. What is the position of the final image
Investigators are researching the appearance of a strange movement of objects in what the local community considers a haunted house. how strong was the magnetic field that produced this EMF
The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5
What will be its length and height at rest
determine the speed of the ball after the ball. A positive charge q is fired by a small hole in the positive plate of a capacitor.
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is 2.70 cm, What is the power of the implanted lens
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 9.42 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3) (b) What is the net charge of all these electrons?
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