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You will use this problem for Questions 8 and 9.  Read carefully!   In physics class, two “frictionless” carts are placed on a track.  The first cart (m1 = 0.620 kg) is pushed to the right with a speed of 4.5 m/s.  The second cart (m2 = 0.790 kg) is pushed to the left with a speed of 1.8 m/s.  If the first cart rebounds with a speed of 0.9 m/s, Q8:  find the speed and direction of the second cart. Q9:  Determine whether the collision is elastic or not. You must show your work for full credit!   For this question, enter the answer to Q9. (You will select “elastic” or “inelastic”.  Your points will be determined based on your written work and can change, even if you answer this correctly).

You will use this problem for Questions 1 and 2.  Read carefully!   A box is moved 3 m across a rough surface by the force shown in the diagram below.  Q1:  How much work is done by the 40 N force? Q2: How much work does friction do as the box is moved 3 m? For this question, enter the answer to Q2.

You will use this problem for Questions 5 and 6.  Read carefully!   A bullet, mb = 0.015 kg, is fired horizontally with a velocity of 800 m/s.  The bullet strikes a stationary wooden block, mw = 3.0 kg, that is hanging from a string.  The bullet embeds itself in the block of wood.  (see diagram below) Q5:  Find the speed of block and bullet immediately after the collision. Q6:  After the collision, what is the maximum height that they will reach, as measured from the block’s initial position? For this question, enter the answer to Q5.  

If the number of employed persons in a country equals 24 million, the number of unemployed persons equals 8 million, and the number of persons in the civilian labor force equals 32 million, the unemployment rate equals:

The gap between exports and imports in a nation’s economy is called the 

Grandpa made $8000 per year in 1970 when the CPI was 38.8.   How much would that be in 2016 dollars when the CPI was 241.353?

The U.S. unemployment rate moves up and down as the economy moves in and out of recessions. But over time, the unemployment rate seems to return to a range of _____________________.

Economist typically measure economic growth by tracking

Cancer patients have a higher chance to acquire a deep venous thrombosis. 

Superficial veins are typically accompanied by an artery.