Analyzing experiments: You think that Bounty paper towels absorb spills better than other towels because ads say that they are the best. You want to know if Bounty absorbs better than the cheaper store brand towel. You place a Bounty paper towel and a store brand paper towel each in two separate beakers filled with 100 ml water for 30 seconds. You then squeeze out each in separate beakers filled with 100ml water. You then squeeze out each and measure in the graduated cylinder how much water was absorbed. Bounty absorbed 30 ml water while the store brand absorbed 40 ml. What is the problem?

What is the control group (normal; doesn’t get special treatment) in this experiment?

What is the constant(stays same for all in experiment)?

What is the independent variable (what is being tested; the ONE thing or factor that is changed or made different on purpose by the scientist)?

What is the dependent variable (what will be measured or observed to see the effect of the independent variable)?

What is the hypothesis?

What is the conclusion?

Was the hypothesis supported or not?

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c