A22 n block rests on a horizontal surface. the coefficients of static and kinetic friction between the surface and the block are μs = 0.80 and μk = 0.60. a horizontal string is attached to the block and a constant tension t is maintained in the string. what is the force of friction acting on the block for each of the following values of t?
the grams of oxygen gas that can be produced is 20.6 grams of o₂
2liclo₃ → 2 licl + 3 o₂
step 1: find the moles of liclo₃
moles = mass÷ molar mass
from periodic table the molar mass of liclo₃ =6.9 +35.5 +(16 x3) =90.4 g/mol
moles=38.7 g÷90.4 g/mol=0.4281 moles
step 2: use the mole ratio to calculate the moles of o2
from equation above, liclo₃: o₂ is 2: 3
therefore the moles of o₂=0.4281 moles x3/2 =0.6422 moles
step 3: find mass of o₂
mass= moles x molar mass
from periodic table the molar mass of o₂ = 16 x2= 32 g/mol
mass=0.6422 moles x 32 g/mol = 20.6 grams of o₂
a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.
d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.
massxgravity x heght=weightxheight= pe
the displacement produced by the body.
the amount of force subjected to the body.
the angle between the direction of force and displacement