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Matthew frequently screams when he wants attention from his mom.  In order to decrease Matthew’s screaming behavior, his mom does not pay attention to him when he screams. When Matthew quietly asks for attention, his behavior is reinforced with attention from his mom.  Which differential reinforcement procedure is Matthew’s mom using?

Using the fundamental equations, identify what

The methotrexate needs to be reversed. Which drug does the nurse prepare to administer?

Hydrogen bonding is a special case of ___________. A. London-dispersion forces B. ion-dipole attraction  C.dipole-dipole attractions D. ion-ion interactions E. none of the above

Which of the following molecules has hydrogen bonding as its only intermolecular force? A. HF B. H2O C. C6H13NH2 D. C5H11OH E. None, all of the above exhibit dispersion forces

The intermolecular force(s) responsible for the fact that CH4 has the lowest boiling point in the set is/are _________. CH4,  SiH4,  GeH4,  SnH4 A. hydrogen bonding B. dipole-dipole interactions C. London dispersion forces D. mainly hydrogren bonding but also dipole-dipole interactions E. mainly London-dispersion forces but also dipole-dipole interactions Periodic Table with New Elements-1.pdf

Which one of the following materials has the highest coefficient of thermal expansion? 

What can the results of the Brinell and Rockwell tests on metals be used for?

This is continuation of the previous question. What is the stress in the steel bar when the temperature decreases to 0 °C?