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2 years ago

14

6. if a cross country runner travels at a speed of 10 mph and he runs for 2 hours, how many miles will he have run at the end of

the 2 hours? calculating distance

1 answer:

storchak [24]2 years ago

5 0

Explanation:

distance = speed x time

distance = 10 x 2

distance = 20miles

hope that helps :)

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What is the mass of a magnesium block that measures 2.00 cm

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m = 31.284 grams

Explanation:

Given that,

The dimension of a magnesium block is 2.00 cm x 3.00 cm x 3.00 cm.

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We need to find the mass of the magnesium block. We know that the density of an object is given by its mass per unit its volume. So,

$d=\dfrac{m}{V}\\\\\text{Where m=mass}\\\\m=d\times V\\\\m=1.738\ g/cm^3\times (2\times 3\times 3)\ cm^3\\\\m=31.284\ \text{grams}$

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Answer:

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