For this part, imagine that the string is wound around the center axle of a yo-yo; the axle radius is raxle, but the yo-yo casing has a radius rcasing≫raxle and moment of inertia I≫mr2axle. In the limit the moment of inertia of the yo-yo I→[infinity] and the mass m of the yo-yo remains finite, what magnitudes would you expect for the tension T in the vertical section of string and the downward acceleration a of the center of mass?

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Determine the maximum r-value of the polar equation r =3+3 cos 0

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?