What might cause a cold spell in the northern united states?
a the doldrums move south
b the subtropical high moves north
c the subtropical jet stream moves north
d the polar jet stream moves south

Read the scenario below and answer the question that follows. hallie is reading a novel in the library when susan, her best friend, slumps down in a chair next to her. susan doesn't say anything, but hallie knows that susan is upset because she is slumping in her seat and rolling her eyes. a psychologist would explain that hallie is interpreting her friend's emotion based on a. the behavioral component of emotion b. her friend's ability to regulate emotion c. the verbal component of emotion d. the physiological component of emotion select the best answer from the choices provided a b c d

Why are current extinctions of concern to enviromentalists?

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees