A ball is rolling across the floor. Its motion can be described by the two vectors above 6m/s east and 3 m/s north. determine the ball’s true motion by finding the resultant of the vectors.

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

Which is not true about oxygen-17 and oxygen-18?

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