A guitar creates sound waves of different pitches when the strings are plucked. How do the sound waves of the higher-pitched notes compare to the sound waves of the lower-pitched notes?
A
The sound waves of notes with higher pitches travel at slower speeds.
B
The sound waves of notes with higher pitches have lower amplitudes.
D
The sound waves of notes with higher pitches have higher
frequencies.
The sound waves of notes with higher pitches have higher
wavelengths.

  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

the answer is kevlar

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 ! : )

radiation

explanation:

heat is transmitted by radiation