What kind of energy transfer is happening between the metal balls or the newton cradle shown ? 1 . Mechanical energy —> Light, chemical & electrical energy

2. Mechanical energy —> electrical, thermal & mechanical energy

3 . Mechanical energy —> Mechanical sound , & thermal energy

4. Mechanical energy —> chemical, sound & thermal energy .

Que actos del pueblo simbolizaron el inicio de la revolucion y la caida de la monarquia?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Which factor contributed to the rise of african empires such as ghana and mali ? a. their creation and involvement in trade networks b. they focused only on agricultural production. c. they didn’t engage in warfare with other nations d. their geographic location protected them from attacks.