A 2000 N effort moves 8 m to raise a 4000 N load 4 m. Calculate MA and VR. Name two breeds of fowl for eggs. State two features distinguishing goats from sheep. Classify velocity, mass, amount of subs

$$MA = 2$$

The mechanical advantage is $\boxed{2}$.

(ii) Velocity ratio

$$VR = 2$$

The velocity ratio is $\boxed{2}$.

Q5b.

(i) Name two breeds of domestic fowls used to produce eggs.

• Leghorn
• Rhode Island Red

(ii) State two characteristics features that distinguish a goat from a sheep.

• Goats typically have a beard, while sheep do not.
• Goats have a tail that points upwards, whereas sheep have a tail that hangs downwards.

(iii) Classify each of the following quantities into base and derived quantities: Velocity, mass, amount of substance, potential difference.

• Velocity: Derived quantity
• Mass: Base quantity
• Amount of substance: Base quantity
• Potential difference: Derived quantity

(iv) State the S.I unit of each of the quantities classified in (iii).

• Velocity: $\text{meter per second}$ ($\text{m/s}$)
• Mass: $\text{kilogram}$ ($\text{kg}$)
• Amount of substance: $\text{mole}$ ($\text{mol}$)
• Potential difference: $\text{volt}$ ($\text{V}$)

(v) Name the two types of biasing in diode operation.

• Forward biasing
• Reverse biasing

Q5c. The element Carbon has three isotopes.
The three common isotopes of Carbon are:

• Carbon-12 ($^{12}C$)
• Carbon-13 ($^{13}C$)
• Carbon-14 ($^{14}C$)