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garri49 [273]
3 years ago
9

If an object has a mass of 81 kg, what is its approximate weight on earth?

Physics
1 answer:
telo118 [61]3 years ago
8 0
The weight of an 81 kg object on earth is 793.8 N.
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The formula is x = 1/2 at^2 and I have managed to fill in the variables as this. d = 1/2 9.81 m/s^2 1^2
Artyom0805 [142]

Right, as you mentioned in the comments, you find d by plugging in the different values of t.

For t=1\,\mathrm s, we have

d=\dfrac12\left(9.81\,\dfrac{\mathrm m}{\mathrm s^2}\right)(1\,\mathrm s)^2

d=\left(4.905\,\dfrac{\mathrm m}{\mathrm s^2}\right)\left(1\,\mathrm s^2\right)

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Similarly, for t=2\,\mathrm s, you get

d=\dfrac12\left(9.81\,\dfrac{\mathrm m}{\mathrm s^2}\right)\left(2\,\mathrm s\right)

d=\left(4.905\,\dfrac{\mathrm m}{\mathrm s^2}\right)\left(4\,\mathrm s^2\right)

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8 0
3 years ago
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use the formula Q=mC(T_2 - T_1) and sub in givens

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Which of these events indicate that a chemical reaction might have occurred?
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