Atorque of 12 n*m is applied to a solid uniform disk of radius 0.50 m. if the disk accelerates at 2.6 rad/s^2 what is the mass of the disk? a) 26 kg b) 25kg c) 17 kg d) 34 kg

mass = 36.92 kg

Explanation:

We have given the torque

Radius of the disk r = 0.50 m

Angular acceleration

We know that torque is given by here I is moment of inertia and is angular acceleration

So

Moment of inertia is given by

m = 36.92 kg

The given answer is not matched with this answer but after calculation i got m =36.92 kg

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

  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