In which of the following instrument is the image that is formed erect a. Pin hole camera b. Simple camera c. microscope d. periscope

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

You can decrease the resistance of a length of wire by