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a person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 278 db the
a solenoid with 375 turns per meter and a diameter of 137 cm has a magnetic flux through its core of magnitude 15 10-4
a single-turn square wire loop 50 cm on a side carries a 450 ma- current what is the magnetic dipole moment of the loop
a solenoid that is 75 cm long produces a magnetic field of 13 t within its core when it carries a current of 69 a how
a 203 kg book is placed on a flat desk suppose the coefficient of static friction between the book and the desk is 0602
suppose you throw a 0058-kg ball with a speed of 109 ms and at an angle of 309deg above the horizontal from a building
a satellite is in a circular orbit around an unknown planet the satellite has a speed of 113 x 104 ms and the radius of
a proton traveling at 310deg with respect to a magnetic field of strength 490 mt experiences a magnetic force of 57
there is a charge of -3e locked down at a point on a table 15 meters away a charge of 3e is released from a scientists
a car battery with a 12 v emf and an internal resistance of 0035 is being charged with a current of 60 aa what is the
a 1250 w radiant heater is constructed to operate at 240 va what will be the current in the heaterab what is the
an unknown resistor is connected between the terminals of a 750 v battery energy is dissipated in the resistor at the
a common flashlight bulb is rated at 030 a and 28 v the values of the current and voltage under operating conditions if
a crate is hanging from a rope which is attached to a metal ring through which a second rope runs what is the angle if
light travels at a speed of about 30 108 msa how many miles does a pulse of light travel in a time interval of 01 s
capacitors c1 565 microf and c2 275 microf are charged as a parallel combination across a 250 v battery the
the current indoor world record time in the 200-m race is 1992 s held by frank fredericks of namibia 1996 while the
a human being can be electrocuted if a current as small as 50 ma passes near the heart an electrician working with
a wire 251 m long and 600 mm in diameter has a resistance of 150 m a potential difference of 280 v is applied between
a motorist drives north for 360 minutes at 670 kmh and then stops for 150 minutes he then continues north traveling 130
a pintildeata of mass 350 kg is attached to a string tied to a hook in the ceiling the length of the string is 078 m
the cheetah can reach a top speed of 114 kmh 71 mih while chasing its prey in a short sprint a cheetah starts from rest
a tortoise can run with a speed of 011 ms and a hare can run 20 times as fast in a race they both start at the same
a new record for running the stairs of the empire state building was set on february 3 2003 the 86 flights with a total
a 900 bullet has a speed of 110 kms1 what is its kinetic energy in joules2 what is the bullets kinetic energy if its