Place the correct event next to the year it occurred. Each of these changed World History.

The following are all important events in World History – Modern Era. Match the following events to its explanation.

For the slider crank mechanism below. At this instant, the input crank (4 in) is rotating counterclockwise at 1 rad/s. What will be the magnitude of the angular velocity of coupler link (6 inch) in rad/s.  (Just enter a positive number to three decimal places, no spaces, no units)(Hint: analytical way is better!)

After the exam is over. You have 10 minutes to upload your work for the relevant free response questions (not the auto-graded ones). Upload as a single pdf file.  Make sure you upload the correct file, not some random HW from some course 🙂

The free-response design questions start here. You’ll submit your work for these as a pdf, right after the exam.

In the documentary Two American Families 1991-2024,  there is this central premise that despite long hours and relentless efforts, many workers still struggle to cover housing, healthcare, education and childcare costs. Wages have stagnated while the cost of living has surged and the promise that effort equals upward mobility may not always be the case. Today, a full-time job doesn’t always guarantee a livable income. Two or even three jobs might still leave families one emergency away from financial ruin. The real question isn’t whether people are working hard enough–it’s why hard work no longer pays off the way it once did. Identify and explain three examples from the documentary that support the above mentioned statements and what needs to change so that the American dream is more than just a myth.   

16) What produces the 21-centimeter radio emission line?

7) What is Hubble’s Law?

12) What type of galaxy was more common when the Universe was younger?

15) Where are most star-forming regions in the Milky Way?