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a motorist travels for 30h at 800 kmh and 40 h at 600kmh what is her average speed for the
consider a reaction in which two reactants make one product for example consider the unbalanced equation a b c you
a concave makeup mirror is designed so that a person 28 cm in front of it sees an upright image magnifiedby a factor of
two hydrogen atoms both initially in the ground stateundergo a head-on collision if both atoms are to be excited to
a student sits on a rotatingstool holding two 20kg objects when his arms are extendedhorizontally the objects are 10 m
the rear window of a van is coated with a layer of ice at0oc the density of the ice is 917kgm3 the driver of the van
ozone is depleted in the stratosphere by chlorine from cf3cl according to the following set of equations cf3cluv
a wire is formed into a120 turn loop whose diameter is 35 cm and the resistance of theloop is 4 ohms the loop is on the
you have a stock concentration of 3m acid and need a working concentration of 250mm in 100ml solution what volume of
a charged particle moves through a velocity selector at a constant speed in a straight line the electric field of the
what is the ph of the resulting solution when 1725 ml of 1800 m hcl is added to a 19 liter solution that has 074 m
the drawing shows two fully charged capacitors c1 200 microf q1 600 microf c2 800 microf q2 120 microf the switch is
a charge of -300 mc is fixed inplace from a horizontal distance of 0045 m a particle ofmass 72 x 10-3kg and charge -80
during a particular thunderstorm the electric potentialdifference between a cloud and the ground is vcloud -vground 13
a cu wire of 60m length is in a maganetic field of120t if it has a mass of 25g what is the minimum current through the
an extension cord is used with an electrc weed trimmer thathas a resistance of 15 ohms the extension cord is made of
water has a mass per mole of 18 gmol and each water molecule has 10 electronsa how many electrons are there in one
a 60 kg student jumps from the 10 meter platform at ekusswimming complex in to the pool belowa determine her peg at the
a toaster uses a nicrhrome heating wire when the toaster isturned on at 20o c the initial current is 15a a few seconds
a certain light source is found to emit radiation whose peakvalue has a frequency of 100e15 hz find the temperature of
in a popular amusement park ride a rotating cylinder of radius300 m is set in rotation at anangular speed of 600 rads
a cylindrical resistor of radius 48 mm and length 20cm is made of material that has a resistivity of350times10-5 omega
a rectangular block of copper has sides of length 12 cm 22 cm and45 cm if the block is connected to a80 v source across
red light n 1520 and violet light n 1538 traveling in air are incident on a slab of crown glass bothcolors enter the
a wire carries a current of 097 a this wire makes an angleof 64 degree with respect to the magnetic field of