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evangelista torricelli was the first person to realize that we live at the bottom of an ocean of air he correctly
an object is projected horizontally what are the three factors which determine the horizontal distance traveled how
a guitars e-string has length 649 cm and is stretched to a tension 846 n it vibrates a fundamental frequency of 32959
two forces f1 -840i 410j and f2 710i 530j are acting on a mass of m 420 kg the forces are measured in newtons what
when a nucleus of 235u undergoes fission it breaks into two smaller more tightly bound fragments calculate the binding
a very light spring of equilibrium length 100 cm is hung from the ceiling with a 040 kg block at its end when the
you stick two blocks together with velcro the manufacturer rated the velcro as needing a force of 50n to separate the
an engine has a hot reservoir temperature of 969 k and a cold reservoir temperature of 602 k the engine operates at
tension is maintained in a string by attaching one end to a wall and by hanging a 206 kg object from the other end of
a gas while expanding under isobaric conditions does 458 j of work the pressure of the gas is 165e5 pa and its initial
a 080 -long metal rod is dropped vertically onto a marble floor when the rod strikes the floor it is determined
a conducting rod with a length of 25 cm is placed on a u-shaped metal wire that has a resistancerof 80 as shown in the
a wooden block of mass m resting on a frictionless horizontal surface is attached to a rigid rod of length and of
a carnot refrigerator absorbs heat from a space at 15 degrees c at a rate of 16000 kjh and rejects heat to a reservoir
when resistors 1 and 2 are connected in series the equivalent resistance is 187 when they are connected in parallel
an experimental space station consists of a large rigid rod with length l 100 m and mass m 10000 kg which rotates
a hot-air balloon is accelerating upward under the influence of two forces its weight and the buoyant force for
what is the longest wavelength that can be observed in the third order for a transmission grating having 6700 slitscm
a simple pendulum consists of a ball connected to one end of a thin brass wire the period of the pendulum is 20000 s
a block of mass m 55 kg is pulled up a 26deg incline as in the figure with a force of magnitude f 37 na find the
a 76-kg man standing on a scale in an elevator notes that as the elevator rises the scale reads 817 n what is the
an object of mass m 150 kg is attached to a cord that is wrapped around a wheel of radius r 120 cm and mass m 500 kg
a 130-kg object undergoes an acceleration of 15 ms2a what is the magnitude of the resultant force acting on itb if this
the rest energy of an electron is 0511 mev the rest energy of a proton is 938 mev assume both particles have kinetic
a football punter accelerates a football from rest to a speed of 8 ms during the time in which his toe is in contact