this is the last question on my booklet and its due today A pendulum is made of a 250-g metal ball suspended 50.0 cm below support by a string. the ball is moved sideways along the swing arc so that it is 40 cm higher than it is at the bottom of its swing. the ball is then released. calculate the speed of the ball at the bottom of the swing

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?

Will you chech and finish these for me, because i am stumped with them.

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?