An electric delivery van has a motor powered by a high-capacity battery. A diesel delivery van has an engine powered by diesel fuel.
Table 1 compares the electric delivery van and the diesel delivery van.
Table 1
| Power source | Maximum acceleration in m/s2\text{m/s}^2m/s2 | Mass of power source in kg\text{kg}kg | Range in km\text{km}km | Maximum power output in kW\text{kW}kW |
|---|---|---|---|---|
| Battery | 3.5 | 620 | 310 | 150 |
| Diesel fuel | 2.4 | 120 | 930 | 110 |
Give two advantages of the diesel delivery van compared with the electric delivery van shown in Table 1.
The mass of the battery in the electric van is 620 kg620 \text{ kg}620 kg. The total mass of the electric van is 2480 kg2480 \text{ kg}2480 kg.
Calculate the mass of the battery as a percentage of the total mass of the electric van.
A charging station has a power output of 22 kW22 \text{ kW}22 kW (22 000 W22\,000 \text{ W}22000 W).
Write down the equation that links energy transferred, power, and time.
Calculate the time taken in seconds to transfer 6.6×107 J6.6 \times 10^7 \text{ J}6.6×107 J of energy to the van's battery.