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a weather balloon filled with helium gas has a volume of285 m3 and pressure 14 x 105 pa at the earths surface where
some ions do not have a corresponding neutral atom that has the same e- config for each of the followings ions identify
while working in a research lab you find that it takes396 j of heat to increase the temperatureof 099 kg of a material
the ph of a bicarbonate-carbonic acid buffer is 780 calculate the ratio of the concentration of carbonic acid h2co3 to
at t0 a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2 radstwo
draw the condensed structural formula of benzyl acetate and circle the acetic acid part and the phenyl
calculate the ph after 0010 mol gaseous hcl is added to 2500 ml of each of the following buffered solutionsa 0050 m nh3
using the factor labeling method solve there are 12 norps in 29 bargs 42 norps in 57 krips and 5821 krips in 118 flegs
every few hundred years most planets line up on the same side of the sun calcute the total force on the earth due to
a nurse needs to draw 200 cc of blood from a patient anddeposit it into a small plastic container whose interior is
a 33 kg box rests on the back of a truck the coefficient of staticfriction between the box and the truck bed is 0300
a tennis player hits a 580 rm g tennis ball so that it goesstraight up and reaches a maximum height of 617 rm mhow much
a rigid iron cylinder contains propane gas the cylinder and thegas are in thermal equilibrium in a process 8700 j of
water flows from a 12 inch diameter pipe with a flow of 1msec how many kg of water flow from the pipe in onesecond in
a container holds 23 mol of gas the total average kinetic energyof the gas molecules in the container is equal to the
a 200g block is released from rest at a height of 25cm on africtionless 30o incline it slides down the inclineand then
two identical trucks have a mass of 5500kg when empty one truck carries a 9500 kg load and is moving at 65kmh it
calculate the size of the quantum involved in the excitation of an electronic motion of frequency 10 x hz express the
a satellite is in a circular orbit about the earth at a distance of one earths radius above the surface what is the
a 300 kg ball is dropped from the roof of a building 1764 m highwhile the ball is falling to earth a horizontal wind
the work function of an element is the energy required to remove an electron from the surface of the solid element the
a string passing over a pulley has a 380-kg mass hanging fromone end and a 315-kg mass hanging from the other end
1 a thin-walled plastic cigarette lighter was found to contain 42g of butane in an interior volume of 512ml calculate
a typical cup of tea is made by starting with six fluid ounces of cold water 177 ml how much heat in joules is required