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the intensity of solar radiation at the top of the earths atmosphere is 1 272 wm2 assuming 60 of the incoming solar
when a high-power laser is used in the earths atmosphere the electric field associated with the laser beam can ionize
light ray enters the atmosphere of the earth and descends vertically to the surface a distance h 92 km below the index
calculate the power spectrum of a square pulse with amplitude a and length t plot the power spectrum showing several
a lens that has a focal length of 890 cm is used as a magnifying glass a to obtain maximum magnification and an image
an electromagnetic plane wave is traveling through a vacuum along the positive z-axis at a particular point in space at
consider an alternating current of the form it sin2pit where t is the time elapsed measured in seconds a at what times
a 12-kg mass suspended from a spring of spring constant 22 nm-1 executes simple harmonic motion of amplitude 5 cm what
an electric oscillator is made with a capacitor and a 10 mh inductor the capacitor is initially charged to 50 v part a
a diesel engine performs 2200j of mechanical work and discards 4300j of heat each cycle a how much heat must be
suppose a 10 kg mass is hung from the end of a vertical oriented massless spring if the spring stretches 10 cm what is
two coins rotate on a turntable coin b is three times as far from the axis as coin a the mass of coin a is twice the
two air track carts move along an air track one behind the other cart a has a mass of 0450 kg and moves toward the
as a coffee enthusiast you wish to keep your coffee as hot as possible for as long as possible you wish to find the
you have a 855-cm-long copper rod with a rectangular cross section of dimensions 521 cm by 745 cm you maintain the ends
since force is dpdt the force due to radiation pressure reflected off of a solar sail can be calculated as 2 times the
when one mole of c6h6 is burned 327 mj of heat is produced when the heat from burning 777 g of c6h6 is added to 569 kg
a compound microscope has a tube that is 1950 cm long the focus of the eyepiece is 15 cm and the focus of the objective
when brewsters angle of polarized light due to a reflection of light off of the surface of water makes a ray of light
a photon with a wavelength 480pm scatters from an electron initially at resta find the maximum kinetic energy for the
a typical sound level for a buzzing mosquito is35db and that of a vacuum cleaner is approximately 69db approximately
an l-r-c series circuit has c48010-6f l 0500h and source voltage amplitude v 545v the source is operated at the
there is evidence that elephants communicate via infrasound generating rumbling vocalizations as low as 14 hz that can
an outside loudspeaker considered a small source emits sound waves with a power output of125wa find the intensity105m
a putty of mass 006 kg is droppe at height h 1 m above a horizontal rod two 2 kg balls are attached to the ends of the