3. What is the weight of Mrs. Chaltry's cat, Dougal, who has a mass of 8 kg?

Weight of Mrs. Chaltry's cat is 78.4 kg.m/

Explanation:

Given

mass of an object, m = 8 kg

Weight (W) is given by the formula:

W = mg , where m is mass of the object and g is acceleration due to gravity and the value is 9.8 m/

Hence W = 8 kg x 9.8 m/

               = 78.4 kg.m/

Hence the weight of Mrs. Chaltry's cat is 78.4 kg.m/

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The Permian–Triassic extinction event, also known as the P–Tr extinction, the P–T extinction, the End-Permian Extinction and colloquially as the Great Dying, formed the boundary between the Permian and Triassic geologic periods, as well as between the Paleozoic and Mesozoic eras, approximately 252 million years ago