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three identical stars of mass 746 times1024 kg are located at the vertices of an equilateral triangle with side 7500 km
an inductor and a resistor are connected in series when connected to a 60 hertz 90 volt rms source the voltage drop
determine what minimum horsepower must a motor have to be able to drag a 350 kilogram block up a 15o ramp at a speed of
a 30-m-long ladder as shown in figure 1239 leans against a frictionless wall the coefficient of static friction among
the mad hatter moves a tea cup across the table by giving it a push if it is initially at rest in front of him and
when light of wavelength 360 nm falls on a lithium surface electrons having a maximum kinetic energy of 115 ev are
an applied force varies with position according to fk1xn - k2 where n3 k184 nm3 and k246 n find how much work is done
a cylindrical disk has volume 89810-3 m3 and mass 798 kg the disk is floating on the surface of some water with its
a 300 gram block is attached to a light horizontal spring the block is free to slide on a horizontal table a force of
it takes 387 joule of work to stretch a hookes-law spring 85 centimeter from its unstressed length compute how much
a person on a balcony that is 28 m off the ground leans over the railing and throws a ball straight up into the air
a submarine is 315 m horizontally out from the shore and 128 m beneath the surface of the water a laser beam is sent
if i put 40g of ice at 0degc into a perfectly insulated cup containing 250g of coffee at 90degc what will the final
two resistors when connected in series to a 110 line use one-fourth the power that is used when they are connected in
discover the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person 20 m from
the height of a helicopter above the ground is given by h 310t3 where h is in meters and t is in seconds after 155
two point sources of light are separated by 45 cmas viewed through a 15 mum diameter pinhole what is the maximum
a laser beam has a power of 1 mw and a diameter of 2257 millimeter find how many photons are emitted per second over an
an electric drill starts from rest and rotates by a constant angular acceleration after the drill has rotated through a
a special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at
a car is going around a circular banked road the banking angle is15 degree the coefficient of static friction among the
a beam of electrons moving in the x direction at 88 x 106 ms enters a region where a uniform magnetic field of 430 g
the ac voltage across a capacitor with c 12 microf has an amplitude of vnbspnbspnbspnbsp max 16 v and the current
a train is traveling down a straight track at 20ms when the engineer applies the brakes resulting in an acceleration of
an 80 kg window cleaner sits 18 meters from the end of a 5 meter long scaffold that is supported at either end by a