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a toy balloon is filled with helium gas he at 1 atm and 28 degree c if the volume of the balloon is 0024m3 how many
35g of copper pellets are removed from a 300c oven and immediately dropped into 80ml of water at 24c in an insulated
a flywheel in the form of a uniformly thick disk of radius 153 m has a mass of 121 kg and spins counterclockwise at 355
a 20-m long steel wire cross-section 10 cm2 youngs modulus 20 acute 1011 nm2 is subjected to a load of 25 000 n how
a 2700 ml- flask is initially open to air at 19 degrees c and 1 atm pressure its then closed and immersed in boiling
a person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 335 db
the intensity level produced by a jet airplane at a certain location is 178 dba calculate the intensity of the sound
a fisherman fishing from its highest to its lowest point he also estimates that the distance between adjacent wave
a circuit consists of an ideal ac generator a 25 microf capacitor and an 90 resistor all connected in series the output
steam enters a turbine at 1240 c and is exhausted at 82 c what is the maximum eficiency of this
a 2500ml - flask is initially open to air at 24 celsius and 1 atm pressure its then closed and immersed in boiling
when you walk toward a mirror you see your image approaching you if you walk at 2 ms how fast do you and your image
a large gate weighing 175 n is supported by hinges at the top and bottom of the wooden frame and is further supported
a balance scale has unequal arms the scale is balanced with a m 150-kg block on the left pan and a m 179 kg block on
a find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to three times the
an organ pipe is open at both ends it is producing sound at its n 5 harmonic the frequency of which is 166 hz take the
a large steam pipe is covered with 17-cm-thick insulating material of thermal conductivity 021 js m degc how much
1 a gas expands changing its volume by 424times10-4 m3 while at a constant pressure of 644times105 pa what is the work
a spherical balloon of volume 408 103 cm3 contains helium at a pressure of 121 105 pa how many moles of helium are in
a electrons are accelerated through a voltage difference of 300 kv inside a high voltage accelerator tube what is the
an intergalactic rock star bangs his drum every 130 s a person on earth measures that the time between beats is 230 s
a sphere rolls without slipping down an incline the sphere has a mass of 0450 kg and a radius of 678 cm the incline
if the mass of mars is 0107 times that of earth and its radius is 0530 that of earth estimate the gravitational
a 460-g lead bullet at 340degc is fired at a speed of 260 ms into a large block of ice at 0degc in which it becomes
a 150-kg iron horseshoe initially at 610degc is dropped into a bucket containing 170 kg of water at 260degc what is the