this is known as baseload cycling and its cost ranges from $ 2 to $ 23 per megawatt hour this also reduces the environmental friendliness of wind power because a coal fired or natural gas power plant must be kept online in case there s no wind two plants are running to do the job of one
Accelerometer in an iPhone. Definition: An accelerometer is a sensor which measures the tilting motion and orientation of a mobile phone. The Apple iPhone was the first popular mobile phone to make the accelerometer a key feature of its user interface. The accelerometer is used to ensure photographs are presented in the correct way - portrait or landscape - depending on the way the phone is held. Accelerometers are also increasingly used as a means of user input, most noticeably in games where tilting and rotating the handset can control onscreen action.
Ultrasonic pest repellers are electronic devices that emit high-frequency sounds designed to repel, injure or kill household pests, such as rodents and insects. Whether they're actually effective at doing so has been disputed by testing labs and the U.S. Federal Trade Commission (FTC).ltrasonic devices are popular and appealing to consumers because of their ease of use and the fact that they are silent to human ears and allegedly eliminate the need for traps and poison, which are thought by some to be inhumane forms of pest control.