Match the letters to the numbers for 30 points!
1.ca
2.h2o
3. nuclear decay
4. nuclear synthesis
5. η
6. positive charge
7. e
8. number of protons in nucleus
a. element
b. proton
c. fusion
d. compound
e. fission
f. atomic number
g. neutron
h. electron

Phase changes are chemical changes. true or false

Ineed the answers for these promblems i have

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?