A carbon resistor has a resistance of 976 ohms at 0 degrees C. Determine its resistance at 89 degrees C​

1028.1184 Ohms

Explanation:

Given the following data;

Assuming the temperature coefficient of resistance for carbon at 0°C is equal to 0.0006 per degree Celsius.

To find determine its new resistance, we would use the mathematical expression for linear resistivity;

Substituting into the equation, we have;

Explanation:

From the given information:

weight of fiber = 3.0 g

weight of composite specimen = 4.0 g

specimen composite weight in water = 2.0 g

specific gravity of fiber = 2.4

specific gravity of matrix = 1.3

The weight of the matrix = weight of the composite - the weight of fiber

⇒ (4.0 - 3.0) g

= 1.0 g

The theoretical density of the composite can be determined by using the formula:

The experimental density is determined  by using the equation:

The void fraction is:

= 0.1818