Scott and Jafar are ready to work a problem. In this simulation, assume the coordinates of the points are as follows. A (0 s, 30 m); B (10 s, 50 m); C (20 s, 38 m); D (30 s, 0 m); E (40 s, −38 m); and F (50 s, −50 m) Recall the definitions of average speed, vavg ≡ d Δt , and average velocity in the x direction, vx ,avg ≡ Δx Δt . Find the average speed from circled A to circled F.

Modify the equation fδt=δ (mv) to find the force of friction.

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.