1.Minimum wire for 5500W heater:
1.5500W 加热器所需的最小导线规格：
2.Parallel device on ammeter:
2.安培计上的并联元件是：
3.A school replaces twenty 75W incandescent lamps with 20W fluorescent lamps. At $0.10/kWh, what is the annual savings?
3.某学校将二十盏 75W 的白炽灯更换为 20W 的荧光灯。若电费为 $0.10/kWh，每年的节约金额是多少？
4.Replacing a 75W bulb with a 20W fluorescent lamp, what is the daily cost at $0.45/kWh?
4.将一盏 75W 的灯泡更换为 20W 的荧光灯，若电费为 $0.45/kWh，每天的运行成本是多少？
5.What is the daily operating cost of a 600W device used 5 hours/day at $0.14/kWh?
5.一台 600W 的设备每天使用 5 小时，若电费为 $0.14/kWh，其每天的运行成本是多少？
