I have to do an experiment/ demonstration for my PHY251 class (Calculus based physics). I am only allowed to do it on one of the following topics: Vectors, Accelerated motion, Centripetal force, Free fall, projectile motion, Inertia, Equilibrium, Friction, Orbits, Tides. Does anyone have any ideas for a cool demonstration? Please provide instructions for the demonstration/experiment. Thank you in advance.

Assume you are performing the calibration step of Experiment 8 and you begin with 20 g of water at 20 oC and 20 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter? Assume room temperature is 25 oC.

In a famous experiment, dating from 1914, Henry Ford introduced a daily wage of $5, which was approximately twice the prevailing wage at the time. The evidence suggests that this policy did indeed pay off in terms of greater effort, lower absenteeism, and other benefits.

Discuss:

1. How is that possible? Which mechanism could possibly lead to this outcome?
2. Do you see any application of this policy experiment in your sector?

Drugs are often used for reducing the blood pressure of hypertensive patients (those with high blood pressure). An experiment was run to investigate the effect of Drug (A or B) and Dose Level (Low or High) on the reduction in blood pressure. The experiment was conducted separately for the 36 patients who had mild hypertension and the 24 patients who had severe hypertension as the researcher suspected that results may differ for the two groups. For this design, there are:

Design an experiment in which you would perform some sort of hypothesis test about frequencies. For your chosen experiment, explain your entire experimental design. What is your population of interest? How are you going to randomly sample the pop? How many replicates will you collect? What will be the form of the data you collect and what test will you perform? What is your null and alternative hypothesis?

A fair coin is tossed until the first head occurs. Do this experiment T = 10; 100; 1,000; 10,000 times in R, and plot the relative frequencies of this occurring at the ith toss, for suitable values of i. Compare this plot to the pmf that should govern such an experiment. Show that they converge as T increases. What is the expected number of tosses required? For each value of T, what is the sample average of the number of tosses required?

part1. A double-blind design is important in an experiment because there is a natural tendency for subjects in an experiment to want to please the researcher.

a. True

b. False

part 2.

Sampling error concerns natural variation between samples, and is always present.

a. True

b. False

part 3. Sampling error can only be eliminated when conducting a questionnaire of students and every question is a closed question.

a. True

b. False

Suppose you want to test the causal claim about chewing gum improving your mood and focus. How could you design an experiment to test this claim? What would the variables be? Would each be manip- ulated or measured? What results would you expect? Sketch a graph of the outcomes you would predict. Would your experiment satisfy the three criteria for supporting a causal statement?

Why is it important for the researcher to control extraneous environmental and social variables in an experiment? How does a researcher do this?

what is the minimum number of IV conditions in an experiment?

What are experimental and control groups? Do all experiments have to have a control groups?

What are experimental and control groups? Do all experiments have to have a control group.

How can you tell if a variable can serve as an IV?

What is a drying agent? When do you use it? What is the drying agent used in the lab? How much drying agent do you use? It has been suggested that drying agents can be collected after an experiment and the hydrated salt heated in an oven to drive off the water. The recycled drying agent can then be used again for another experiment. Is this a good idea? Give advantages and disadvantages of this proposal.