3. A boy walks 7.00 km [E], then 2.50 km [W] and finally 9.5 km [E] b) Calculate the boy's displacement using the formula.

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

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader