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several 60w incandescent light bulbs are wired in one circuit protected with a 15a breaker the voltage of the household
a compact fluorescent light bulb cfl consuming 9 w electricity produces the same light output from a 40 w incandescent
the belt of a van de graff generator carries a surface charge density of 450 mcm2 the belt is 0500 m wide and moves at
an automotive battery has an emf of 120 v when supplying power to the starter motor the terminal voltage of the battery
an electron is accelerated during 2100 v from rest and then enters a uniform 160 t magnetic field1 what is the minimum
a 28 cm tall object is 28 cm to the left of a lens with focal length of 15 cm a second lens with a focal length of 18
a dentist wants a small mirror that when 200 cm from a tooth will produce an upright image that is 5 times larger what
an optical engineer needs to ensure that the bright fringes from a double-slit are 157 mm apart on a detector that is
1 a man of 500 kg mass is in equilibrium among two parallel plates the man is charged up to 130 mc of charge the
a 050-f and a 14-f capacitor c1 and c2 respectively are connected in series to a 16-vbattery1 calculate the charge on
a 35kg block moving at 20 ms toward the west on a frictionless surface has an elastic head-on collision with a second
two spherical point charges each carrying a charge of 40 mc is attached to the two ends of a spring of length 20 cm if
how much energy is required to place four positive charges each of magnitude 50 mc at the vertices of a square of side
two capacitors connected in parallel produce an equivalent capacitance of 450f however when connected in series the
a 1210 kg car is driving on 60 kmh on an inclined plane the car is located on the top of the plane the plane is 655 m
a 290kg crate is initially moving with a velocity that has magnitude 408ms in a direction 370 west of northhow much
a driver is traveling at 72 kmhr when she sees a red light in the distance she keeps traveling at this speed for two
a soccer ball is at rest on the ground 32 m away from a fence a boy kicks the ball towards the fence w a velocity of 20
a bullet is fired horizontally from a gun at the exact instant the trigger is pulled a ball is released from the exact
when a potential dissimilarity of 12 v is applied to a wire 83 m long and 030 mm in diameter the result is an electric
a capacitor is fully charged using a battery with vemf 1537 v the battery is disconnected and a resistor with r 6979
what is the capacitance of two square parallel plates 67cm on a side that are separated with 18mm of paraffin the
1 mev neutron strikes 12c nucleus initially at rest if the neutron is elastic scattered during an angle of 90o1 what is
an alpha particle with a kinetic energy of 130mev makes a head-on collision with a gold nucleus at restwhat is the
a 45kg box slides down a 41-m -high frictionless hill starting from rest across a 17-m -wide horizontal surface then