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a piano wire with mass 265g and length 790cm is stretched with a tension of 340n a wave with frequency 115hz and
a machine shop has 100 equally noisy machines that together produce an intensity level of 90 db if the intensity level
hearing the siren of an approaching fire truck you pull over to the side of the road and stop as the truck approaches
as observed on earth a certain type of bacteria is known to double in number every 229 hours two cultures of these
an electron traveling at v 120 x 105 ms passes from 200 m 100 m 300m to 700 m 300 m 100 m and then immediately enters
what is the speed and total energy of an electron whose kinetic energy is 3 times its rest energy what is the speed and
you build an lrc series circuit using a 300 v ac source and variable frequency a 100 o resistor a 10 0 microf capacitor
wave crest pass the bow of anchored boat every 3 seconds the distance between two crest is 66 m what type of wave is it
two radio-frequency point sources s1 and s2 separated by distance d 16 m are radiating in phase with 04 m a detector
a piece of thin spherical shell that has a radius of curvature of 110 cm is silvered on both sides the concave side of
two kilograms of steam at 2 mpa 250deg c are contained in a rigid vessel how much heat must be removed from this vessel
air in a closed piston-cylinder device arranged to maintain a pressure of 400 kpa is heated from 27 deg c to 227 deg c
a distant quasar is found to be moving away from the earth at 090 c a galaxy closer to the earth and along the same
a 100 kg mess kit sliding on a frictionless surface explodes into two 5 kg parts one moving at 45 ms due north and the
one of the contests at the school carnival is to throw a spear at an underwater target lying flat on the bottom of a
a thin film with index of refraction n 148 is placed in one arm of a michelson interferometer perpendicular to the
it takes 25 turns to drive a screw completely into a block of wood because the friction force between the wood and the
a converging lens f1 240 cm is located 560 cm to the left of a diverging lens f2 -280 cm an object is placed to the
an object is in front of a converging lens f 021 m the magnification of the lens is m 48a relative to the lens in
a weather balloon is designed to expand to a maximum radius of 17 m when in flight at its working altitude where the
a long wire carrying 140 a is perpendicular to the magnetic field lines of a uniform magnetic field of magnitude 65 mt
two identical machines are positioned the same distance from a worker the intensity of sound delivered by each machine
a thick copper wire of length 10 m is observed to stretch 010 cm what is the strain if the applied force is 50000 n
estimate the terminal velocity for a dust particle in air assume it has a radius of 10 um and a density similar to that
a simple pendulum is swinging back and forth through a small angle its motion repeating every 113 s how much longer