1. When two dissimilar materials contact each other some of the electrons in one material will be drawn into the other material, this effect can be increased by rubbing the two surfaces together. What charging process is involved? A. charging by conduction B. charging by friction C. charging by induction D. all of the above 2. A student has a neutrally charged glass rod and a neutrally charged silk cloth. When the student rubs the silk cloth on the glass rod, the rod acquires a net positive charge. What is the charge on the silk cloth after the student performs this experiment? A. the silk has no charge B. the silk has a charge that is equal in magnitude to the glass rod's charge, but it is negative C. the silk is positively charged and has a greater magnitude of charge than the glass rod D. the silk is negatively charged and has a smaller magnitude of charge than the glass rod

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.