28. unbalanced because in reactant side the Aluminium is 1 and oxygen is 2 but in the product side the Aluminium is 2 and oxygen is 3 it is not equal so it is unbalanced equation
29. unbalanced because the oxygen atom are not equal in the reactant and the product side
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Answer: v=d−at
Explanation: I don't know if this will help
Physicist Ernest Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.
Answer:
2.525m/s^2
Explanation:
16.3-6.2 is a difference of 10.1m/s. Dividing this by 4, you get a deceleration of 2.525m/s^2. Hope this helps!
Scientists use parallax to measure the distance between stars
