Answer:
British mathematician William Bourne made some of the earliest known plans for a submarine around 1578, but the world’s first working prototype was built in the 17th century by Cornelius Drebbel, a Dutch polymath and inventor in the employ of the British King James I. Drebbel’s sub was probably a modified rowboat coated in greased leather and manned by a team of oarsmen. Sometime around 1620, he used it to dive 15 feet beneath the River Thames during a demonstration witnessed by King James and thousands of astonished Londoners. Unfortunately, none of Drebbel’s plans or engineering drawings has survived to today, so historians can only guess about how his “diving boat” actually operated. Some accounts say it submerged via a collection of bladders or wooden ballast tanks, while others suggest that a sloping bow and a system of weights were used to propel the boat underwater when it was rowed at full speed.
Explanation:
Answer:
Differences between African Americans and European Americans were examined to find how ethnic identity salience was enacted in interethnic conversations, A sample of 126 African Americans and 78 European Americans was recruited from the community using a snowball sampling method. First, different factor structures for the two groups indicated that African Americans conceptualize sociocultural and political identity as separate constructs while European Americans express a singular and social definition of ethnic identity and experience less identity salience than African Americans. Secondly, although our sample is small, those who used the label “African American” expressed greater political ethnic identity salience than those who used the label “Black”. This finding is consistent with others' research indicating a continuing trend toward a positive political posture for African Americans. Third, ethnic identity was found to be negatively related to interethnic communication satisfaction for European Americans. Stronger European American ethnic identity was related to less satisfying interethnic conversational outcomes in less intimate relationships. Ethnic identity salience showed no significant relationship to interethnic conversational outcomes for European Americans communicating with friends nor for African Americans no matter the relational distance.
<span>D. Baron Von Steuben
is your answer
he was the prussian veteran that trained American troops at Valley Forge
hope this helps</span>
