at which point should a researcher inform the respondents about the use of deception in a psychological study ? ?

a.
at the start of the study
b. at the end of the study
c. after publishing the study
d. during the course of the study

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.