Which of the following describes the principle of conversation of charge? a. charge is created b. a charge can be transferred c. charge cannot be created or destroyed, just transferred d. charge can be destroyed

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

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Who was the first scientist to measure speed as distance over time?