What is the propagation speed of sound in the soft tissue with a transducer 5MHZ and another one 7 MHZ in usual modes?

Two sound waves with frequencies of 10 MHZ and 5 MHZ travel to a depth of 3 cm in a medium and then reflected back to the surface of the body. Which acoustic wave arrives first at the surface of the body?

  (04.03 MC) Which of the following statement shows the difference between the monetary aggregates M1 and M2?

(02.07 MC) Use the graph to answer the question that follows.At the points T1 and T3 of this economy’s business cycle, which of the following occurred?

(05.01 MC)Question refers to the excerpt below.”We have not sought to extend our territorial possessions by conquest, or our republican institutions over a reluctant people. It was the deliberate homage of each people to the great principle of our federative union. If we consider the extent of territory involved in the annexation, its prospective influence on America, the means by which it has been accomplished, springing purely from the choice of the people themselves to share the blessings of our union, the history of the world may be challenged to furnish a parallel…We may rejoice that the tranquil and pervading influence of the American principle of self-government was sufficient to defeat the purposes of British and French interference…From this example European Governments may learn how vain diplomatic arts and intrigues must ever prove upon this continent against that system of self-government which seems natural to our soil, and which will ever resist foreign interference.”Source: James Polk, from the State of the Union Address, December 2, 1845One effect of the sense of American superiority described in this excerpt was

(02.03 LC)The Yamasee and Creek peoples

(02.01 LC)How did the views of land ownership differ between American Indians and Europeans?

media is the plural of medium.

(06.03 MC) The United States and the countries of Europe are trading partners. If the average income of dollar holders increases, what should be the result in the market for the euro, the currency of many European countries?

(04.06 MC) Which of the following would be an open-market transaction by the central bank to combat a high unemployment rate?