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the aire outside a hot-air balloon has a temperature of 17 c assume the pressure of the gas inside the balloon is
a 0138-a current is charging a capacitor that has square plates 520 cm on each side the plate separation is 400 mma
a block of wood floats on water 80 of the wood is submerged in water now a layer of oil is carefully poured on top of
a narrow beam of white light is incident at 30 on a 110cm -thick piece of glass the rainbow of dispersed colors spans
1 a 1000-turn loop radius 0032 m of wire is connected to a 20 ohm resistor as shown in the figure a magnetic field is
a beam of light with red and blue components of wavelengths 670 nm and 425 nm respectively strikes a slab of fused
a telescope can be used as a camera if the film is placed at the image position of the objective lens or mirror so the
a beam of light traveling in air is incident on a transparent plastic material at an angle of incidence of 49deg the
the g string on a violin has a fundamental frequency of 196 hz it is 280 cm long and has a mass of 0500 g while this
two trains on separate tracks move toward each other train 1 has a speed of 129 kmh train 2 a speed of 750 kmh train 2
a water storage tower is filled with freshwater to a depth of 64m it has a circular basin with and are of 30m2a what
a closed organ pipe is 05m long if the speed of sound is 340ms a what is the pipes fundamental frequencyb what is its
an airplane traveling at half the speed of sound emits a sound of frequency 596 khza at what frequency does a
a merter stick pivoted at its center has a 100gm mass suspended at its 20cm marka where should an 80gm mass be placed
one end of a 68-cm-long copper rod with a diameter of 24cm is kept at 480c and the other is immersed in water at
a crate is dragged 3m across a rough floor at a constant speed by a worker applying 500n at an angle of 30 deg above
a star similar to our sun radiates energy at the prodigious rate of 42 x 1026 wa at what rate does this star convert
a commuter train passes a passenger platform at a constant speed of 429 ms the train horn is sounded at its
an outside loudspeaker considered a small source emits sound waves with a power output of 80 wa find the intensity 90 m
an object with a mass of 300 kg moving with an initial velocity of 500i ms collides and sticks to an object of mass 200
a train sounds its horn as it approaches an intersection the horn can just be heard at a level of 56 db by an observer
there is evidence that elephants communicate via infrasound generating rumbling vocalizations as low as 14 hz that can
the toadfish makes use of resonance in a closed tube to produce very loud sounds the tube is its swim bladder used as
a sound wave from a siren has an intensity of 862 wm2 at a certain point and a second sound wave from a nearby
one of the loudest sounds in recent history was that made by the explosion of krakatoa on august 26-27 1883 according