Acar going 50 miles/hr accelerates to pass a truck. 5 seconds later the car is going 80 miles/hr. what is the acceleration of the car?

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

For which pair of objects would adding the same a

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?