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a 50-cm-tall object is placed 16 cm from a convex lens with a focal length of 84 cmwhat are the image height and
an object that is 24 cm from a convex lens produces a real image that is 13 cm from the lens what is the focal length of the
a ball is 65 m from a convex mirror with a magnification of 075if the image is 025 m in diameterwhat is the diameter of the actual
a light ray is reflected off a plane mirror at an angle of 25deg from the normala light ray from another source is reflected 54deg from the
an astronomer observes that a molecule in a galaxy travelling toward earth emits light with a wavelength of 514 nm the astronomer identifies the
a helium atom is in a galaxy travelling at a speed of 489 x 106 ms away from the earth an astronomer on earth observes a frequency from the helium
an overhead light fixture holds three light bulbs every light bulb has a luminous flux of 1892 lmthe light fixture is 18 m above the floorwhat is the
a 350-hz tuning fork is held over the end of a pipe that is inserted into water what is the spacing between the resonance lengths of the pipe if the
the end of a pipe is inserted into water a tuning fork is held over the pipeif the pipe resonates at lengths of 15 cm and 35 cm what is the
a submarine is travelling toward a stationary detectorif the submarine emits a 260-hz sound that is received by the detector as a 262-hz sound how
the engine on a motorcycle hums at 85 hz if the motorcycle travels toward a resting observer at a velocity of 296 ms what frequency does the observer
when an orchestra is tuning up the first violinist plays a note at 256 hza what is the wavelength of that sound wave if the speed of sound in the
a fishing lines lead sinker has a volume of 140 x 10-5 m3 the density of lead is 12 x 104 kgm3what is the apparent weight of the sinker when immersed
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a car of mass 135 x 103 kg sits on a large piston that has a surface area of 123 m2the large piston is linked to a small piston of area 144 cm2what
the cross-sectional areas of the pistons in the system shown below have a ratio of 25 to 1if the maximum force that can be applied to the small
assume that two linked pistons are both cylindrical in shape show that the ratio of forces generated is directly proportional to the square of the
sample of ethane gas molar mass amp 301 gmol occupies 12 x 10-2 m3 at 46degc and 24 x 105 pahow many moles of ethane are present in the samplewhat is
a typical brick has dimensions of 200 cm x 100 cm x 50 cm and weighs 200 n how does the pressure exerted by a typical brick when it is resting on
a woman wearing high heels briefly supports all her weight on the heels if her mass is 45 kg and each heel has an area of 12 cm2 what pressure does
what is the change in temperature of water after falling over a 500-m-tall waterfallsuppose that the water is at rest just before falling off and
a cylinder having 100 g of water at the boiling point is heated until all the water turns into steam the expanding steam pushes a piston 0365 mthere
trying to make an interesting pattern an artist slowly pours 100 cm3 of liquid gold onto a large block of ice at 000degc while being poured the
a 200 x 103-g sample of water at 1000degc is mixed with a 400 x 103-g sample of water at 00degc in a calorimeter what is the equilibrium temperature
a 2350-kg granite tombstone absorbs 28 x 107 j of energy from the sun to change its temperature from 50degc at night to 200degc during an autumn day