1. xác định hẳng số lí tưởng của oxi và cacbonic 2 xác định hệ số mũ đoạn nhiệt của khí oxi và cacbonic
3 xác định nhiệt dung riêng đẳng tích của oxi và cacbonic

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

What are similarities and differences of reflection, refraction, diffraction and absorption?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?