Acar x of mass 1000kg moves at a speed of 20m /s in direction due east collides head on with an other car y of mass 1500kg moves at 15m/s in a direction due west if two cars stick together find their common velocity after collision

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk,in meters?

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