Câu 2: Vật nhỏ chuyển động theo phương trình 2 r t i t j   2 3sin   
(SI). Coi rằng π
2 = 10. Độ lớn
vận tốc của chất điểm tại thời điểm t = 10s là:
A. 24,6 m/s. B. 41,1 m/s. C. 52,3 m/s. D. 18,6 m/s.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

dang that balls went far

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation