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an object of mass 15 kg falls from a height of 80 m above the ground what will be its speed and kinetic energy when it
an indoor running track is square-shaped with rounded corners each corner has a radius of 530 m on its inside edge the
a 160 cylindrical rod of diameter 0550 is connected to a power supply that maintains a constant potential difference of
two infinitely large sheets of charge are vertical parallel to each other and 240 cm apart one of the sheets has a
a line of negative charge lies along the x-axis from -340 cm to 530 cm the line has a net charge of -850 nc that is
an engine of an aircraft propeller delievers an amount of power 171 hp to the propeller at the rotational velocity of
a string is wrapped several times around the rim of a small hoop with radius 800 cm and mass 0180 kg the free end of
a rocket which is in deep space and initially at rest relative to an inertial reference frame has a mass of 724 x 105
a space vehicle is coasting at a constant velocity of 206 ms in the y direction relative to a space station the pilot
a ball of mass 0075 kg is fired horizontally into a ballistic pendulum the pendulum mass is 0350kg the ball is caught
a softball of mass m 0183 kg is pitched at a speed v0 269 ms due to air resistance by the time it reaches home plate
a 310-mh inductor has a reactance of 220 ka what is the frequency of the ac current that passes through the inductorb
a copper wire is 900 m long and has a cross-sectional area of 200 10-4 m2 this wire forms a one turn loop in the shape
a child is twirling a 00215-kg ball on a string in a horizontal circle whose radius is 0143 m the ball travels once
man hanging upside down is holding a partner who weighs 604 n assume that the partner moves on a circle that has a
a helicopter starting from rest accelerates straight up from the roof of a hospital the lifting force does work in
an olympic high jumper wants to cross a bar 19 m off the ground while mantaining a velcity of 148 ms how fast does she
a nascar racecar rounds one end of the martinsville speedway this end of the track is a turn with radius approximately
a large capacitance of 140 mf is needed for a certain applicationa calculate the area the parallel plates of such a
a what voltage must be applied to the 100 microf capacitor of a heart defibrillator to store 450 j in itkvb find the
a heart defibrillator delivering 400 j of energy by discharging a capacitor initially at 10000 v has a capacitance of
a uniform field of magnitude 1500 nc points north what is the force on an electron placed in the
an electron in a picture tube moves with an acceleration of 70 times 1016 ms2 what is the magnitude of the electric
find the capacitance of a parallel plate capacitor having plates of area 600 m2 that are separated by 0200 mm of
a doubly charged ion is accelerated to an energy of 300 kev by the electric field between two parallel conducting