The jeans equations: (a) consider the dark matter density profile p(r) (5) 4πgr2 which gives rise to constant rotation curves mal" and isotropic suppose that the dark matter is "isother- so that the 1d velocity dispersion o2 = a^0,d the jeans equation analog for "hydrostatic equilibrium" in spherical coordinates and =const. wvrite down v2/2 for this system show o2 galaxy at large radius r 3.5, but they contribute mass to the system. again using the jeans equations (but using gravity set (b) next consider their distribution is approximately spherical with p. c population of stars which orbit the same a negligible by the dark matter of equation 5), solve for o2

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

force tends to be low and long diustance masses are high

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19