a a Imagine a basketball bouncing. As it is moving up, does it have a positive or a negative acceleration? Why?

moving up positive acceleration

Explanation:

when moving up as you bounce the ball

the speed changes gradually increasing so according to the equation

acceleration =[speed change ] ÷ period when speed change is positive acceleration is also positive , and an greater value

example speed changes 5m/s within 2 seconds throwing the ball upward

(these are assuming values to explain)

acceleration is 5/2 = + 2.5 m/s^2

so this is an positive acceleration

if negative we call deceleration

  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

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true