V<span>(a) </span>
<span>Let: </span>
<span>a be the acceleration of the system, </span>
<span>g be the acceleration due to gravity, </span>
<span>T be the tension in the string. </span>
<span>For mA: </span>
<span>T = mA a </span>
<span>For mB: </span>
<span>mB g - T = mB a </span>
<span>Adding to eliminate T: </span>
<span>mB g = (mA + mB)a ...(1) </span>
<span>a = mB g / (mA + mB) </span>
<span>= 7.0 * 9.81 / (11.0 + 7.0) </span>
<span>= 3.815 m/s^2 </span>
<span>= 3.82 m/s^2 to 3 sig. fig. </span>
<span>(b) </span>
<span>Let: </span>
<span>s be the distance to the edge of the table, </span>
<span>t be the time taken. </span>
<span>s = at^2 / 2 </span>
<span>t = sqrt(2s / a) </span>
<span>= sqrt(2 * 1.250 / 3.815) </span>
<span>= 0.810 sec to 3 sig. fig. </span>
<span>(c) </span>
<span>From (1): </span>
<span>(mA + mB)(a / g) = mB </span>
<span>mA(a / g) = mB(1 - a / g) </span>
<span>mA = mB(g / a - 1) </span>
<span>= 4.0(100 - 1) </span>
<span>= 396 kg.</span>
The correct option is "A. Lusitania "
The sinking of the RMS Lusitania, which occurred off the coast of Ireland on May 7, 1915 due to the attack of a German submarine, was one of the greatest naval disasters to have occurred to a line ship during the First World War.
The Lusitania had the misfortune to fall victim to a torpedo shortly after the start of the First World War, before techniques for the evasion of submarines were implemented. The contemporary investigations of the accident that took place in the United Kingdom and the United States, about the precise causes that had caused the loss of the ship were obstructed due to the necessities of keeping secrets in time of war, as well as to the propaganda campaign parallel to ensure that all the blame fell on the German enemy. The debate over whether the ship was a legitimate military objective continued throughout the war, while both sides made confused statements about the incident. At the time of the sinking, the Lusitania carried on board a large amount of ammunition and military equipment, in addition to civilian passengers. Over the years after the sinking, various attempts have been made to dive into the wreck and gather accurate information about how the ship sank, and the debate continues.
The correct option is:
South Carolina encouraged immigration by offering grants of land to new immigrants; other areas of the country were unable to offer such land grants.
Immigration was important for the South Carolina new proprietors since they could only make a profit with new settlers. In 1670 the colony started granting land for rent for a penny an acre for five years.
The colony did receive migrants from other colonies and the British Isles, but in the first few years, most came from the British sugar islands in the Caribbean, particularly Barbados.
The correct answer is:
a. The Northeast
After the war of 1812, the Northern Industrialization began to expand exponencially. New England gave birth to Industrialized manufacturing. The production mainly relied on mechanized sources with water power, and later steam, to provide the force necessary to drive machines, which were created by wealthy merchants along the rivers of the Northeast.
Answer: C
Explanation: According to Arab oral tradition, Islam first came to Africa with Muslim refugees fleeing persecution in the Arab peninsula. This was followed by a military invasion, some seven years after the death of the prophet Mohammed in 639, under the command of the Muslim Arab General, Amr ibn al-Asi.
