1. splitting of a nucleus excited
fusion
2. combining of light nuclei
3. residue from a split atom
hydrogen
chain reaction
4. causes U-235 to fission
fission
5. repeated fissions
short
6. machine that burns nuclear fuel
reactor
7. range of nuclear forces
neutron
8. nucleus that has excess energy
fission fragment
9. fuel used by the sun
Co-60
10. isotope used in medical treatment

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

continuous conducting path for current, power supply