1st derivative gives velocity;
d r(t)/ dt = 2t i + 6 j + 4/t k
2nd derivative gives acceleration;
d^2 r(t)/ dt^2 = 2 i - 4/ t^2
Speed ;
Square root of (4 t^2 + 36 + 16/ t^2)
For a given time, like 2 seconds, t will be 2. And answer of speed will be scalar.
It is false. The effect of freezing is almost the exact opposite
<span>Because they occur at an atomic level, changing the actual structure of the thing.
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<span>A. How could energy become the matter present today? </span>
