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a hollow sphere of inner radius 80cm and outer radius 90cmfloats half -submerged in a liquid of density 800kgm3a what
the following results were obtained from a titration of a weak acid with a strong base volume naoh added 2235 2247
a copper rod has a length of 12 m and a cross-sectional area of40 x10-4 m2 one end of the rod is incontact with boiling
1 each of the following isotopes is used in medicine indicate the number of portons and neutrons in each isotope a
1 the concentration of carbon monoxide in an urban apartment is 48 microgm3 what mass of carbon monoxide in grams is
a wheel is freely rotating at 850 revmin and has a mass of 275 kg and a radius of 7 m if the wheel can be stopped in 7
four point charges have equl magnitudes three are positiveand one is negative they ae fixed in place on the
1 a the diameter of earth at the equator is 7926381 mi round this number to three significant figures and express it in
a very large thin plate has uniform surface charge density sigmatouching it on the right is a long wide slab of
a swimmer wears a heavy belt to make her average densityexactly equal to the density of water her mass including
in a typical television or in an older computer picture tube crtthe electrons that strike the screen to form an image
1 a the density of titanium metal is 451 gcm3 at 25 degc what mass of titanium displaces 1250 ml of water at 25 degcb
a train is traveling up a 32deg incline at a speed of 360ms when the last car breaks free and begins to coast how long
a nonrefelctive coating n143 covers the glass n152 ofa camera lens assuming that the coating prevents reflection
find the equilibrium concentrations of a and b for a1 and b1 assume that the initial concentration of is a 10 and that
in a particular television picture tube the measured beamcurrent is 560 microa how many electrons strike the screen
calculate the density of a bar of gold with a length of 10 cm a width of 9 cm a height of 6 cm and a mass of 873
in thin layer chromatography what mobile phase would give poor mobility of methyleneblue please
the ratio rxrt of the radius of an unknown nucleus azx to a tritium nucleus 31t is rxrt 110 both nuclei contain the
in a mall a shopper rides up an escalator between floors at the top of the escalator the shopper turns right and walks
two protons are moving directly toward one another when they arevery far apart their initial speeds are 21 106 ms what
what is the energy in ev of a a 100 mhz radio-frequency photon b a visible light photon with a wavelength of 500 nm
what mass of li2s is needed to prepare 300 ml of a solution having a litium ion concentration of 0050
the acceleration of a particle along an x axisis a 70twith t in seconds and a inmeters per second squared at t 30 s
a 10-m-by-14-m house is built on a 12-cm-thick slab of concrete what is the rate of heat loss through the slab if the