Answer:
Explanation:
A = 3m
B = 4 m
let the angle between the two vectors is θ.
the resultant of two vectors is given by
(a) R = 7 m
So, 
49 = 9 + 16 + 24 Cosθ
Cosθ = 1
θ = 0°
Thus, the two vectors are inclined at 0°.
(b) R = 1 m
So, 
1 = 9 + 16 + 24 Cosθ
Cosθ = - 1
θ = 180°
Thus, the two vectors are inclined at 180°.
(c) R = 5 m
So, 
25 = 9 + 16 + 24 Cosθ
Cosθ = 0
θ = 90°
Thus, the two vectors are inclined at 90°.
Answer:
1) The energy released during nuclear fission or fusion, especially when used to generate electricity is called nuclear energy.
2) It is not renewable because it is an element that has no way whatsoever to regenerate or replicate itself, nor gets created by any natural terrestrial means, neither makes itself available by arriving from outer space (like sunlight). There is a limited amount of it available on the Earth, and every bit you use is a bit you’ll never have available again (as Uranium atoms get destroyed by the fission process).
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Answer:
Matthias Schleidan
Explanation:
because Matthias Schleiden found that all plants are composed of cells, and communicated the finding to Schwann, who had found similar structures in the cells. Other researchers confirmed the similarity, as explained in his book, where he concluded, "All living things are composed of cells and cell products.
This became the cell theory.
I learn that in my old school.
Distance/ time = 100/5 = 20 km per hour
The average speed at 5hrs is 20 km per hour.
