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the current in a 120-v reading lamp is 18 a if the cost of electrical energy is 0070 per kilowatt-hour how much does it
a proton beam in an accelerator carries a current of115microa if the beam is incident on a target how many protons
a280-kg block is initially at rest on a horizontal surface a horizontal force of760n is required to set the block in
an 8 g bullet traveling at 340 ms is shot into a 07 kg block of wood suspended from the ceiling by a 25 m long light
two wooden blocks rest on an inclined plane making an angle of 30 degrees to the horizontal the coefficient of friction
a car is traveling at520mih on a horizontal highwaya if the coefficient of static friction between road and tires on a
an extreme pogo stick utilizes a spring whose uncompressed length is 48 and whose force constant is 11times104 a 53-kg
two infinitely long straight and parallel wires carry current in opposite directions of 100 a the wires are a distance
a horizontal wire is hung from the ceiling of a room by two massless strings the wire has a length of 021 m and a mass
in a certain rlc circuit a46-resistor a11-mh inductor and a 5-microf capacitor are connected in series with an ac power
an observatory has an 8-inch celestron telescopea estimate the diffraction limit of this telescopeb estimate the
an asteroid is seen in opposition from earth once every 1000 daysa what is the sidereal orbital period of the asteroidb
an air mass has a temperature of 68f and 970hpa with a mixing ratio of 5 gkg without any condensation or mixing the air
assume a planet is a uniform sphere of radius r that somehow has a narrow radial tunnel through its center also assume
a projectile is shot directly away from earths surface neglect the rotation of the earth what multiple of earths radius
a microscope with a magnification of 1000 using a converging lens with a focal distance of 15 cm for the objective the
moon effect some people believe that the moon controls their activities if the moon moves from being directly on the
a 0470-kg glider attached to the end of an ideal spring with force constant k 500 nm undergoes shm with an amplitude
a square loop length along one side 20 cm rotates in a constant magnetic field which has a magnitude of 20 t at an
a wedding ring of diameter 17 cm is tossed into the air and given a spin resulting in an angular velocity of 12
1 an electromagnetic velocity filter sometimes called a wien filter is used in a variety of experiments and other
if an object on a horizontal frictionless surface is attached to a spring displaced and then released it will oscillate
the current is increasing at a rate of32as in an rl circuit withr400ohmsandl360mh what is the total potential
two conductors made of the same material are connected across the same potential difference conductor a has twice the
a disk of radius r and mass m 10 g is rotating freely about a fixed axis through its center with angular velocity w