Một chất điểm dao động điều hòa trên trục Ox. Tốc độ trung bình của chất điểm trong một chu kì là 8 cm/s. Tốc độ trung bình của chất điểm trong nửa chu kì là
A. 8 cm/s B. 4 cm/s C. 2 cm/s D. 16 cm/s

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.

the right answer is 0.3 meters per second