请解答这个物理习题---**Textual Information:** 23. (12 分) 如图甲所示为一款具有加热和保温功能的榨汁机, 其内部电路简化示意图如图乙所示, R₁ 和 R₂ 为加热电阻, 该榨汁机的部分参数如表所示。求: **榨汁机部分参数表** | 额定电压 | 220V | 加热功率 | 440W | | -------- | -------- | -------- | -------- | | 榨汁功率 | 66W | 保温功率 | 88W | (1) R₂ 阻值为多少? (2) 榨汁时电动机正常工作电阻为 1Ω, 电动机工作 10min 因发热消耗的电能是多少? (3) 榨汁机的热效率是 50%, 杯子中盛有果汁 500g, 使其温度升高 20°C, 榨汁机需要加热 200 秒, 求榨汁机实际加热功率是多少? 【c_果汁=4×10³J/(kg•°C)】 **Chart/Diagram Description:** **Figure 甲:** * Type: Product illustration. * Description: A photograph or drawing of a blender/juicer machine. * Main Elements: * Blender base with controls/buttons. * A jug/cup placed on top. * Labels pointing to parts: "榨汁开关" (Juicing Switch), "杯身" (Cup/Jug Body), "保温开关" (Keep Warm Switch), "加热开关" (Heating Switch). **Figure 乙:** * Type: Electrical circuit diagram. * Description: A simplified circuit diagram of the juicer's internal wiring. * Main Elements: * Voltage Source: Labeled "220V". * Switches: S₁, S₂, S₃ (all are single-pole, single-throw switches). * Motor: Labeled "M", connected in series with switch S₁. * Resistors: R₁ and R₂. R₁ is connected in series with switch S₂. R₂ is connected in series with switch S₃. * Connections: * The 220V source is connected to the main circuit. * Switch S₁ and motor M are in series, forming one branch connected across the 220V source. This branch is for juicing. * Switch S₂ and resistor R₁ are in series, forming another branch connected across the 220V source. This branch involves heating. * Switch S₃ and resistor R₂ are in series, forming a third branch connected across the 220V source. This branch involves heating/keeping warm. * The three branches (M, R₁, R₂) are connected in parallel across the 220V source, each activated by its corresponding switch (S₁, S₂, S₃). * Labels: S₁, S₂, S₃, M, R₁, R₂, 220V, 乙 (label for Figure 乙).