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- Homework Statement
- A piece of wax is attached to a Newton metre. In air, the reading on the Newton metre is 0.27 Newton and when submerged in water of density 1000 kg per metre³ the reading is 0.16 Newton. Calculate: the reading on the newton-meter when the wax is submerged in a liquid of density's 800kg/m³

- Relevant Equations
- Density=Mass/volume

I have solved the question in the following way:

The downward force is equal to the upward force. the upward force is equal to the weight of water displaced. If we find the weight of the water displaced then we will know the upward force. And since upward force is equal to downward force, we will automatically know the value on the Newton-meter.

Volume of water displaced= 1.1×10-5 (we found this in the previous part of the question)

Weight=Mass×Gravitational field strength= Density×Volume×Gravitational field strength= 800 × 1.1×10-5×9.81 = 0.086N

My answer is coming 0.086N, but I checked the answer sheet and 0.086 is not the right answer. Kindly tell where am I going wrong.

The downward force is equal to the upward force. the upward force is equal to the weight of water displaced. If we find the weight of the water displaced then we will know the upward force. And since upward force is equal to downward force, we will automatically know the value on the Newton-meter.

Volume of water displaced= 1.1×10-5 (we found this in the previous part of the question)

Weight=Mass×Gravitational field strength= Density×Volume×Gravitational field strength= 800 × 1.1×10-5×9.81 = 0.086N

My answer is coming 0.086N, but I checked the answer sheet and 0.086 is not the right answer. Kindly tell where am I going wrong.

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