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a vacuum cleaner is plugged into a 1200-v socket and uses 44 a ofcurrent in normal operation when the back emf
a sce and an indicator electrode were connected to a voltmeter all conditions were standard the observed cell emf at 25
the chemical 5-amino-23-dihydro-14-phthalazinedione better known as luminol is used by forensic scientists in analyzing
a pulley of 50cm radius on a motor is turning at 30 revsand slows down uniformly to 20 revs in 20s calculatea the
two resistors r1100 ohms and r2 200 ohms are connected inparallel across a battery the current through r1 is 0150
a 3000-kg spacecraft is in a circularorbit 1200 km above the surfaceof mars how much work must the spacecraft engines
a wheel of 40cm radius rotates on a stationary axle it isuniformly speeded up from rest to a speed of 900 rpm in a time
calculate the theoretical amount of cacl2 that would be required to change the temperature of 500 ml of water from 20c
part a methyl violet is an indicator that changes color over a range from ph00 to ph16 what is ka of methyl violetpart
a 53 db sound wave strikesan eardrum whose area is 47 multiplied by 10-5 m2a how much energy is absorbed by the eardrum
leadii forms soluble hydroxo complexes in excess base calculate the molar solubility of lead hydroxide yellow form at
if a 200 g ball is dropped from 100 meters what is its velocity just before it hits the ground what is its velocity
if 1676 ml of an aqueous solution of naoh reacts with 05683 g of khc8h4o4 how many moles of naoh reacted what is the
a 200 g ball is thrown upwards with an initial kinetic energy of 10 joules what maximum height will the ball reach
use the ksp values to calculate the molar solubility of each of the following compounds in pure waterpart a baso4 ksp
a ball of clay falls to the ground from a hieght of 15m itsis in contact with the ground f 020 sec before coming torest
a parallel-plate capacitor is made from two aluminum-foil sheets each 30 cm wideand 500 m long between the sheets is a
190 ml of 0126 m diprotic acid h2a was titrated with 01017 m koh the acid ionization constants for the acid are ka1
a student stands on a bathroom scale in an elevator atrest on the 64th floor of a building the scale reads 836 na as
gasoline flows through a 1 inch diameter hose at an average speedof 5 ftsa what is the rate of flow in cubic feet per
a beaker with 160 ml of an acetic acid buffer with a ph of 500 is sitting on a benchtop the total molarity of acid and
a halfback on an apparent breakaway for a touchdown is tackled frombehind if the halfback has a mass of 91kg and was
twenty-five milliliters of liquid nitrogen density 0807 gml is poured into a cylindrical container with a radius of
a cylinder with a piston contains 0250 mol of oxygen at 240 h105 pa and 355 k the oxygen may be treated as anideal gas
what is the gravitational force between two 15-kg packages that are 35cm apart what fraction is this weight of one