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stan and ollie are standing next to a train track stan puts his ear to the steel track to hear the train coming he
the longest string a thick metal wire on a particular piano is 30 m long and has a tension of 3000 n it vibrates with a
water flows from a fire truck through a hose that is 117 cm in diameter and has a nozzle that is 2 cm in diameter the
you pull downward with a force of 241 n on a rope that passes over a disk-shaped pulley of mass 135 kg and radius 00785
a projectile is fired horizontally from a gun that is 520 m above flat ground the muzzle velocity is 215 ms how long
you need to know the height of a tower but darkness obscures the ceiling you note that a pendulum extending from the
a solenoid with a cross-sectional area of 188times10-3 m2 is 0760m long and has 445 turns per meter find the magnitude
a stationary railroad whistle is sounded an echo is heard 50 seconds later by the trains engineer if the speed of sound
an iron casting containing a number of cavities weighs 169677 n in air and 130458 n in water what is the total volume
it is possible to make a thermometer by sealing gas in a rigid container and measuring the absolute pressure such a
on average each person in the industrialized world is responsible for the emission of 10000 kg of carbon dioxide every
a sinusoidal electromagnetic wave emitted by a cellular phone has a wavelength of 354 cm and electric field amplitude
an electromagnetic wave with frequency 650 hz travels in an insulating magnetic material that has dielectric constant
the sound level measured 52 m away from a jet engine is 140 dba what is the intensity of the sound at 52 mb what is the
a wooden cube of side 030 m has density of 700 kgm3 and floats partially submerged in seawaterdensity 1025 kgm3a what
a tennis ball of mass 561 10-2 kg initially moving at a speed of 315 ms hits a wall and rebounds with a speed of 180 ms
a tungsten target is struck by electrons that have been accelerated from rest through a 678-kv potential difference
a ray of light is traveling in a glass cube that is totally immersed in water you find that if the ray is incident on
a light beam travels at 194times108 in quartz the wavelength of the light in quartz is 355 part a what is the index of
you are driving along a highway at 25 ms when you hear the siren of an emergency vehicle traveling in the opposite
in a calorimetry experiment an unknown amount of steam at 100 c is added to 15 kg of ice at 0c in a well insulated and
a stainless steel flask with volume 10 liters is filled with 14 moles of helium gas at 27 ca what is the pressure of
an 800 kg car moving at 6 ms begins to coast down a hill 40m high with its engine off the driver applies the brakes so
the biochemistry that takes place inside cells depends on various elements such as sodium potassium and calcium that
a toy rocket moving vertically upward passes by a 21m -high window whose sill is 80m above the ground the rocket takes