Some Formulas are derived by means of experimentation. Among these are the formulas discovered by pascal,

1.1 a formula for changing temperature from Fahrenheit to centigrade.

2. a formula showing the relation of weights on a balance with the lengths of its arms.

3. -a formula used in finding electrical power.

4.a formula for finding work done in foot pounds.

5. an ohms law, a formula for finding

6. a formula for finding the distance covered by falling bodies.

**Galileo and Archimedes**. They are called empirical formulas.**Examples of Empirical formulas**:1.1 a formula for changing temperature from Fahrenheit to centigrade.

2. a formula showing the relation of weights on a balance with the lengths of its arms.

3. -a formula used in finding electrical power.

4.a formula for finding work done in foot pounds.

5. an ohms law, a formula for finding

*I*, the number of amperes of electric current , E, the electromotive force in volts, and R, the resistance in ohms.6. a formula for finding the distance covered by falling bodies.