Correlation coefficients indicate the: internal and external validity between variables. magnitude and direction of the relationship between variables. significance and variability between variables. cause-and-effect relationship between variable

What is the fate of the electrons that interact with a specimen in an electron microscope?

What are two different ways you could find the value of a? explain these methods.

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?