Question 6 (1 point) A5 kg hammer is lifted to a height of 9 m and dropped. How fast is it moving when it has fallen to a height of m from the ground?
Question 7 point)
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Explain vector addition, triangle method and parallelogram method

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.