In an experiment on obedience to authority, one subject tells another that the shocks might not be real. Which issue of invalidity is present in this scenario?

A) John Henry effect
B) contamination
C) placebo effect
D) Hawthorne effect

Drug abuse will not lead to physical and psychological dependence. true or false ?

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.