Part I. True or False. 1 . 1 Joule = 0.239calorie 2. Coulomb\'s law describes th

Question

Part I. True or False. 1 . 1 Joule = 0.239calorie 2. Coulomb's law describes the electric force occurring 3. An electric current flows from the negative terminal to 4. Speed of mechanical waves is determined by the 5. If a wire with a resistance of 10 has a diameter of 6. Echolocation is the process of using reflection of 7. e is the biggest observed portion (quantum) of electric 8. Electrons have negative charge and protons have between two charges the positive properties of the medium 0.5 mm and length of 2 m, its resistivity is 1x10-6 /m waves from an object to determine its location. charge. positive charge.

Explanation / Answer

1) True

2) yes coulomb force is electrostatic force between two charges., True.

3)false, Current always flows from +ve to - ve terminal.

4) True, mechanical waves ( sound waves) are medium dependent.

5) True,

resistivity = R*A/L

R =resistance

A=area

L= length of wire

Thus by substituting above values, resistivity is approx 1 × 10^-6.

6) True, this method is used in sonar.

7)False, e is the smallest observed fraction of charge.

8) True.

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