DONT KNOW THE DIFFERENCE BETWEEN DOUBLE RAY AND SINGLE RAY DIAGRAMS HEL So I'm in grade 9 and I have a test tmrw. I dont know the differnce between single ray and double ray diagrams(in reflection).Can someone help pls :( ?

Formulating a hypothesis: part i since the investigative question has two variables, you need to focus on each one separately. thinking only about the first part of the question, mass, what might be a hypothesis that would illustrate the relationship between mass and kinetic energy? use the format of " because when writing your hypothesis