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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
the work function for platinum is 635 ev ultraviolet light of wavelength 150 nm is incident on the clean surface of a
a heat engine operating at maximum efficiency has an efficiency of 25 the temperature of the cold reservoir is 300 k
if 550 cm of copper wire diameter 100 mm is formed into a circular loop and placed perpendicular to a uniform magnetic
a solenoid 145 m long and 330 cm in diameter carries a current of 120 a the magnetic field inside the solenoid is 160
if a planet has a radius 20 greater than of the earth but has the same mass as the earth what is the acceleration due
a carpenter on a space station has constructed a 300deg ramp a rocket moves past the space station with a relative
what is the angular momentum of a figure skater spinning at 20revs with arms in close to her body assuming her to be a
suppose the force acting on a tennis ball mass 0040 kg points in the x direction and is given by the graph of fig 7-30
transverse waves with a speed of 430 ms are to be produced on a stretched string a 540-m length of string with a total