3 years ago

A rock is dropped from a height of 2.7m. How fast is it going when it hits the ground?

Physics

1 answer:

Lana71 [14]3 years ago

4 0

Use the formula Vf^2 = Vi^2 + 2a(d)

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3 years ago

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Answer:

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F-?

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3 years ago

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Calculate the heat required, in calories, to raise

Goshia [24]

Answer: $Q=4450.74\ J$

Explanation:

Given

mass of tin $m=100 gm$

Also we know that

specific heat of tin $c_{tin}=0.21 J/gm-^{\circ}C$

Melting Point of Tin $T=231.94^{\circ}C$

Heat required to raise the temperature of 100 gm tin is given by

$Q=mc\Delta T$

where $Q=heat\ added$

$c=specific\ heat\ of\ tin$

$\Delta T=change\ in\ temperature$

$Q=100\times 0.21\times (231.94-20)$

$Q=4450.74\ J$

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3 years ago