How does the sky change as earth rotates on its axes

How will the emission of an alpha particle affect the atomic number of an atom

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?