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Sound waves are being used to determine the depth of a freshwater lake, as shown in the figure below.
If the water is 25°C and it takes 1.2 s for the echo to return to the sensor, how deep is the lake?
why wouldn''''t you be electrocuted if you walked under an electric transmission line during a rainstorm?
They are exactly analogous to water pressure and water flow by a hose. That's why flowing electrons is known as a current, just like a water current. Voltage is the electromotiv
Applied Force (Fapp) : an applied force is a force that is useful to an object by a person or another object. If a person is approaching a desk across the room, there is applied fo
Calculating unknown resistances The current through the galvanometer (G) - a very sensitive ammeter, is reduced to zero by adjusting R 4 . The bridge is then said to be balanc
what is the displacement of the body when potential and kinetic energies are eqal?
define
Object-Image Relationships Ray tracing for a thin lens showing the formation of a real image of an object.
An equiconvex lens has the radius of one curved surface is 0.12 m and focal length of 0.10 m. Determine the refractive index of the material of the convex lens.
Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth
Is this wavelength in vacuum? Answer; as per mass of CPH is constant, and Vc is for an alone CPH, so wavelength should be in vacuum, that there is not any gravity effect. But i
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