At her cousin's birthday party, Sarah sticks two straws up her nose and makes a funny face. The other children laugh. When her mother sees what she is doing, she
gives Sarah a dirty look and tells her to stop it. Which behavior was positively
reinforced?
a) the dirty look.
b)no behavior was positively reinforced.
c) sticking straws in her nose and making a silly face.
d) laughing.

Explain the impact of the end of slavery and the civil war on former slaves and people living in the south

Charles schenck was a u.s. citizen and private in the army. while in military training during world war i, schenck printed and passed out leaflets explaining why he was against the draft (required military service). he was charged with violating the espionage act of 1917, a federal law outlawing any action interfering with military operations. schenck believed the espionage act violated his right to free speech. in which court would this case ultimately be decided, and why? a state criminal court, because schenck was accused of violating a criminal law a military tribunal, because the matter involved members of the military a county civil court, because it involved violation of a civil liberty the u.s. supreme court, because schenck challenged whether the law was constitutional

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?