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a lr circuit has l 00082 and r 33 ohms how long after it is turned on will the current in this circuit reach 63 of its
four wires are carrying a 10a current in the same direction the wires are at the corners of a square of sides s10m
a transformer has 100 turns in the primary coil and 20 turns in the secondary coil if the input voltage is 120v what is
a pitcher throws a 075 kg baseball at 30 ms towards a batter the batter swings and applies 7000n of force on the ball
why are hydrogen bonds so important in determining the properties of water what unusual properties of water have we
an electron q 160 x 10 -19 c is moving in the x direction at 100 x 108 ms when it encounters a constant magenetic
a circular loop of radius r 015mm carries a current of i 20a in a constant magnetic field b 010t what is the torque of
a microwave projects 10kw of power onto a 0250-m2 area what is the intensity of the microwave what is the peak
when a atom absorbe energy and go ground state to a excited state whether the kinetic energy of this atom will change
using a grating with a spacing of 000045 cm a line which looks like red light appears 32 cm from the central line on a
a proton moving in a uniform magnetic field withv1127times106ims experiences forcef 1146times10-16kn a second proton
1 64 g of a radioactive substance is prepared 85 hours later only 2 g remains to the nearest hour what is the
the momentum of object 1 is 666942 kg ms the momentum of object 2 is 323914 kg ms object 1 collides with object 2 and
the momentum of object 1 is 286761 kg msnbspthe momentum of object 2 is 14445 kg msnbspnbspobject 1 collides with
object 1 has a mass 862 and is moving to the right at 153 ms object 2 has a mass 593 and is moving to the left at 122
the gravitational potential energy of a person on a 30-m-high diving board is 1800j what is the persons
a horizontal circular wire loop of radius 06 m lies in a plane perpendicular to a uniform magnetic field pointing from
a 187 m long steel beam is accidentally dropped by a construction crane from a height of 677 m the horizontal component
the plane of a rectangular coil 59 cm by 7 cm is perpendicular to the direction of a uniform magnetic field bif the
an ac voltage source has an rms voltage of 16 volts and it is connected in series to an inductor a capacitor and a
the proper tangential speed for machining cast iron is about 0630nbspms at how many revolutions per minute should a
an ice cube is placed in a microwave oven suppose the oven delivers 105 w of power to the ice cube and it takes 32300 j
a diverging lens has a focal length of - 100 mm an object is 750 mm to the left of the lens a the image is mm to the
a converging lens has a focal length of 100mm an object is 245 mm to the left of the lens a the image isnbspmm to the
a beam of light incident at 35o to the surface normal from the air side n 100 if the refracted medium is water n 133