Here are a few points to consider:
1. Voltage and Speed: The speed of an electric motor is directly proportional to the applied voltage. In general, as the voltage increases, the motor's speed increases as well.
2. Load and Torque: The load refers to the resistance or opposition that the motor must overcome to perform a task. Torque is the rotational force produced by the motor to overcome the load. The speed of the motor decreases as the load increases, and it increases as the load decreases.
3. Motor Design: The design of the electric motor also plays a role in its speed. Different types of motors, such as induction motors, synchronous motors, or DC motors, have inherent speed characteristics determined by their construction and operating principles.
Therefore, it is not possible to provide a specific speed for an 800-watt appliance without knowing the operating voltage, load conditions, and motor design. The speed can range from a few hundred revolutions per minute (RPM) to several thousand RPM, depending on the specific application.