The Sun's radiation comes to Earth as many different wavelengths of electromagnetic energy. One form of energy is ultraviolet radiation. A person's overexposure to the Sun's
ultraviolet radiation (UV rays) is the biggest risk factor for skin cancer. Some ultraviolet
radiation is absorbed by the ozone layer, which is located in Earth's atmosphere. This ozone
layer provides a natural protection for living organisms.

State one reason why all of the ultraviolet radiation coming toward Earth does not reach Earth's surface.

i feel your pain too because i cant find my dad and hes been missing for 17 years of my life

explanation:

he went to the supermarket with your dad

  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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.