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an electric heater is rated at 1300 w a toaster is rated at 1150w and an electric grill is rated at 1530 w the three
a lawn roller is pushed across a lawn by a force of 115newtonsalong the direction of the handle which is225o above the
dry coke composed of 4 inert solids ash 90 carbon and 6 hydrogen is burned in a furnace with dry air the solid refuse
a very long straight wire carries a current of 017 a this wire is tangent to a single-turncircular wire loop that also
you stand on a frictional platform that is rotating at 14 revs your arms are outstretched and youhold a heavy weight in
the combustion of 01584 grams of benzoic acid increases the temperature of a bomb calorimeter by 245 degrees c
two ice-skaters whose masses are 45 kg and 75 kg holdhands and rotate about a vertical axis that passes between
a coil of inductance 90 mh and unknownresistance and a 080 microf capacitorare connected in series with an alternating
two neutrons are in an infinite square well with l 20 fm what is the minimum total energy that the system can have
some ions do not have a corresponding neutral atom that has the same electron configuration for each of the following
a 25 g bullet fired horizontally hits a 145 kg block of wood placed on a horizontal surfacethe bullet penetrates into
to reduce the power requirement of elevator motors elevators arecounterbalanced with weights connected to the elevator
two packages at ups start sliding down the 20degree ramp package a has a mass of 5 kg and coefficient of friction of
water runs out of a horizontal drainpipe at the rate of 120 litersper minute it falls 320m to the ground assuming the
a cosmic-ray proton in interstellar space has an energyof 165 mev and executes acircular orbit having a radius equal to
each of the three helicopter rotor blades shown in the figureis 520 m long and has a mass of 240 kg therotor is
if a magnetic compass is placed between the plates of a fully charged capacitor why wouldnt the compass will align
a 10g sample of an unknown salt molar mass 40 gmol is added to 750ml of water the temperature of the water rises 32oc
a peak intensity of an em wave is 340x107 wm2 if the peak magnetic field is 287x10-6 t what is the peak electric
by using photons of specific wavelengths chemists can dissociate gaseous h-i to produce h atoms with accurately known
a wind turbine is initially spinning at a constant angular speedas wing strength gradually increases the turbine
as current flows through a uniform wire the wire gets hotterbecause the electrons slow down and therefore transform
a baking dish is removed from a hot oven and placed on a coolingrack as the dish cools down to 320degc from 193degc its
two identical batteries of emf epsilon 917 v and internalresistance r 0279 omega are to be connected to an external
determine the mole fractions and partial pressures of co2 ch4 and he in a sample of gas that contains 125 mole of co2