Một bình khí giãn nở kém có thể tích 20 lít chứa 10g khí hydro ở áp suất 8,2 at. Hơ nóng đẳng tích khối khí này đến khi áp suất của đó bằng 9 at . Hỏi nhiệt độ của khối khí sau khi hơ nóng là

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

What does si stand for,when referring to a system of measurement