What is the first step of the hydrogen fusion process?
O H+H - H+ et + v + energy
• He + He - He +2 (1H) + energy
• H+H - {He + energy
• 6({H) + 2C_%e) – įHe + 2({H) + energy + 2v

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche? during an avalanche, the( 1 ) energy of the snow on the mountain is converted into ( 2 ) energy as the snow cascades down. ( 1 ) a. elastic b. kinetic c. potential d. radiant ( 2 ) a. chemical b. kinetic c. nuclear d. potential

Stages 1 and 4 of the demographic transition are similar in that