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in the figure a metal rod is forced to move with constant velocity along two parallel metal rails connected with a
an electron is in the fifth bohr orbit of hydrogena calculate the speed of the electronb calculate the time required
one end of a string 78 m long is moved up and down with simple harmonic motion at a frequency of 720 hz the waves
two identical uniform poles of mass 50 kg and linear mass density 15 kgm are supported by pivots 2 m apart on level
a ghter plane ying at constant speed 420 ms and constant altitude 10000 m makes a turn of curvature radius 2800 m on
a perfect transformer has 20 v and 2 a in its primary coil 200 turns in its primary circuit and 20 in its second how
a small loop of area a74 mm2 is inside a long solenoid that has n747 turnscm and carries a sinusoidally varying current
a double speed trap is set up on a freeway one police car is hidden behind a billboard and the other is some distance
a torsional pendulum comprises a uniform vertical quartz fiber attached to the top of a uniform solid sphere of mass m
calculate the total mass of the protons and electrons in 199f use 1007825 amu as the mass of 11hmass of a proton and an
the earth orbits about the sun once every 365 days the distance between the earth and the sun is 15x1011 m what is the
a rocket which has an exhaust speed of 8 kms is to have a lift off vertical acceleration of 8 ms2 from the nasa launch
an electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive
as an electron moves through a region of space its speed decreases from 8106 ms to 3106 ms through what potential
a solid sphere and a solid disk of the same mass and radius are rolling wihtout slipping at the same speeda what is the
a buffer contains equal amounts of a weak acid and its conjugate base and has a ph of 525 which of the following values
a cylinder of mass 140 kg rolls without slipping on a horizontal surface at a certain instant its center of mass has a
1 write the ionization equation and the ionization constant expression for these weak acids a hbro bhso3- ch2po4- 2
a capacitor has plates that are located 08 meters from each other with air as the material between the plates the
a 255 g oscillator has a speed of 930 cms when its displacement is 390 cm and 745 cms when its displacement is 600
why is uranium-235 able to undergo a chain reaction while many other nuclei cannot athe energy produced is enough to
an x-ray tube is operated at 40600 va calculate the minimum wavelength of the radiation emitted by this tubeb if this
consider the air pollutants no and no2 contributors to photochemical smog both can be formed by the reation between