Which of the following is not a scalar quantity ? a) temperature b) Coefficient of friction c) charge d) Impulse

Options

A. Temperature
B. Coefficient of friction
C. Charge
D. Impulse

Explanation

To determine which of the given options is not a scalar quantity, we need to understand the definitions of scalar and vector quantities.

1. **Definition of Scalar and Vector Quantities**:
- **Scalar Quantity**: A quantity that has only magnitude and no direction. Examples include temperature, mass, and energy.
- **Vector Quantity**: A quantity that has both magnitude and direction. Examples include force, velocity, and impulse.

2. **Analyzing Each Option**:
- **Option a: Temperature**: Temperature is a measure of thermal energy and has only magnitude (e.g., 25°C). Therefore, it is a scalar quantity.
- **Option b: Coefficient of Friction**: The coefficient of friction is a ratio that describes the frictional force between two surfaces and has only magnitude. Thus, it is also a scalar quantity.
- **Option c: Charge**: Electric charge (e.g., +1 Coulomb) has only magnitude and does not have a direction associated with it. Hence, it is a scalar quantity.
- **Option d: Impulse**: Impulse is defined as the product of force and the time duration over which the force acts. Since force is a vector quantity (having both magnitude and direction), impulse also has both magnitude and direction. Therefore, impulse is a vector quantity.

3. **Conclusion**:
Among the given options, impulse (option d) is the only quantity that is not a scalar quantity; it is a vector quantity.

Thus, the answer is:
**d) Impulse**

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