Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +19.3 km/s to −18.8 km/s over a period of 2.07 years. (a) what is the total change in the asteroid's velocity? (indicate the direction with the sign of your answer.) -3.81e4 correct: your answer is correct. m/s (b) what is the asteroid's average acceleration during this interval? (indicate the direction with the sign of your answer.) -5.84e-6 incorrect: your answer is incorrect. how does average acceleration depend on the change in velocity and the change in time? m/s2 additional materials

As per above given data

initial velocity = 19.3 km/s

final velocity = - 18.8 km/s

now in order to find the change in velocity

Part b)

Now we need to find acceleration

acceleration is given by formula

given that

now the acceleration is given as

so above is the acceleration

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

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