B. A physical combination of two or more different materials.
Answer:
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Yes they can have a trace of polar in them
I think the ratio of copper to iron will still be the same even if you add more nails in the beaker. This is because each nail placed is assumed to have the same composition with the other nails and is assumed to be homogeneous.
Answer:
1) The smallest scale increment is 0.1 cm.
2) The distance represented by the dotted line "a" is 5.25 cm and the uncertainty in this measurement is ± 0.05.
3) The distance represented by the dotted line "b" is 5.85 cm and the uncertainty in this measurement is ± 0.05.
Explanation:
1) The smallest scale increment is 0.1 cm.
- That the distance between any two numbers on the ruler (for example; 4&5) is 1.0 cm.
- There are 10 increments between the two numbers which means that the increment scale (the smallest scale increment) is 0.1 cm.
2) The distance represented by the dotted line "a" is 5.25 cm.
- The dotted line "a" lies between 5.2 and 5.3 and it is mainly in the middle between the two smallest increments ≅ 5.25.
- The uncertainty in this measurement is ± 0.05 as shown in the image attached in the question that the measurement may be off by as much as 0.05 cm above or below its true value.
2) The distance represented by the dotted line "b" is 5.85 cm.
- The dotted line "b" lies between 5.8 and 5.9 and it is mainly in the middle between the two smallest increments ≅ 5.85.
- The uncertainty in this measurement is ± 0.05 as shown in the image attached in the question that the measurement may be off by as much as 0.05 cm above or below its true value.