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a rotating door is made from four rectangular sections as indicated in the drawing the mass of each section is 76 kg a
by considering the torques about the centers of the ball joints in your shoulders estimate the force your deltoid
a solid cylinder is rolling on a surface what fraction of its total kinetic energy is in the form of rotational kinetic
laser light can be focused at best to a spot with radius r equal to its wavelength lambda suppose that a 10-w beam of
two blocks collide on a friction less surface after the collision the blocks stick together block a has a mass m and is
a child is riding a merry-go-round which completes one revolution every 836 s the child is standing 465 m from the
a 650-kg person throws a 0045 0-kgsnowball forward by a ground speed of 300 ms a second person with a mass of 600 kg
electric breakdown sparks occur in air if the electric field reaches 3times106 nc at this field strength free electrons
a circular loop of radius 010 m is rotating in a uniform magnetic field of 020 t find the magnetic flux during the loop
a certain airplane has a speed of 3415 kmh and is diving at an angle of theta 260deg below the horizontal when the
a 64 kg skier starts from rest at height h 16m above the end of a ski-jump ramp fig 8-39 as the skier leaves the ramp
an infinitely large flat electrode is levitating an object that weighs 50 kg that object has a surface charge of 75
what is the thinnest soap film excluding the case of zero thickness that appears black when illuminated with light with
a molecule of dna deoxyribonucleic acid is 224 microm long the ends of the molecule become singly ionized negative on
a 175 gram ball on the end of a string is revolving uniformly in a horizontal circle of radius 0500 m the ball makes
an airplane maintains a speed of 630 kmh relative to the air it is flying during as it makes a trip to a city 750 km
a roller coaster descends 35 meters in its initial drop and then rises 23 meters before going over the first hill if a
as observed on earth a certain type of bacterium is known to double in number every 18 hours two cultures of these
a small body of mass m can move on an inclined plane which forms an angle alpha 10 degrees with the horizontal the
an unknown element is found to have an absorption spectrum with lines at 30 70 and 90ev and its ionization energy is
an isolated capacitor of unknown capacitance has been charged to a potential dissimilarity of 200 v when the charged
a 200 uf capacitor is charged with a 1500 v power supply then disconnected from the power and connected in series with
a 120 uf capacitor is charged to a potential of 50-v and then discharged during a 175 ohm resistor how long does it
the plates of a parallel plate capacitor are separated by 5mm the electric field among them is 42 x 105 vm a proton is