One shake is equal to:

1. 10^-9 s
2. 10^-8 s
3. 10^-10 s
4. 10⁸ s

Which of the following unit is equivalent to watt?

1. Volt x Ampere
2. Volt/Ampere
3. Ampere/Volt
4. Ohm

The S.I. unit of energy is:

1. Joule
2. Kg m²
3. Kg m²s^-3
4. Kg m²s^-1

The S.I. unit of pressure is:

1. Kg m^-2s^-2
2. Kg m^-1s^-2
3. Kg m²
4. Kg ms^-2