Dalton thought that atoms were indivisible particles. But Thomsons discovery of the electron proved that the subatomic particles exist.
B is the correct answer if I remember
Answer:
Average velocity = 0.3 m/s.
Explanation:
Given data:
Total distance from house to store = 500 m
Distance he traveled from store and stop before reached to house = 200 m
Total time taken = 910 sec
Average velocity = ?
Solution:
Formula:
Average velocity = displacement / time
Displacement = distance from start - end point
Displacement = 500 m - 200 m = 300 m
Average velocity = 300 m/ 910 s
Average velocity = 0.33 m/s
Average velocity = 0.3 m/s.
2H consists of one proton and one neutron. The atomic mass of a proton is 1.00782u. The atomic mass of a neutron is equal to 1.00866u
Total mass=2.016u and mass of deuterium is equal to 2.01u
Mass difference= 0.002388u
BE = 0.002388×(3×108)²
=3.56912×10-13J
=2.230 Mev
=1.1153 Mev/nucleon
