A homemade capacitor is assembled by placing two 9-in. pie pans 4cm apart and connecting them to the opposite terminals of a 6-Vbattery.

Part A:

Estimate the capacitance.

C= ?? V

Part B:

Estimate the charge on each plate.

Q= ?? C

Part C:

Estimate the electric field halfway between the plates.

E = V/m

Part D:

Estimate the work done by the battery to charge the plates.

W= ?? J

The force constants for the diatomic molecules CO and HI are 1860 N/m and 320 N/m respectively.

Plot the potential energy curves for these two in a way that highlights their differences (i.e. on a single graph).

Calculate the frequency of motion for both molecules (does this result surprise you?).

Calculate the wavelength of light needed to excite these molecules from their vibrational ground states (v=0) to their vibrational first excited states (v=1).

You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages.

Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

Answer:

Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

Answer:

Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

Answer:

Describe an appropriate method of analysis for the data you collect from this experiment.

Answer:

You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.

a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

d. Describe an appropriate method of analysis for the data you collect from this experiment.

You believe that requiring students to attend a series of presentations on study skills will improve their grades. You are concerned that boys and girls might react differently to such a series, and that students in grades 9 and 10 might react differently than those in grades 11 and 12. You set up an experiment involving 100 students in ninth and tenth grade and 100 students in eleventh and twelfth grade. (Assume there are equal numbers of girls and boys in each grade.) You intend to measure improvement based on pre- and post-treatment grade-point averages a.

a. Describe the design of an experiment to help you determine if a set of presentations on study skills is effective in improving grades.

b. Suppose you have 50 students and need to assign them to two groups of equal size. Describe a randomization procedure that would achieve this.

c. Suppose you have 50 students and need to assign them to two independent groups. Describe a randomization procedure that would achieve this.

d. Describe an appropriate method of analysis for the data you collect from this experiment.

1. Suppose we perform a binomial experiment 50 times where the probability of success on any given trial is 0.20. Which of the following is correct?

1. μ = 10 and σ = 3.16

2. μ = 8 and σ = 3.16

3. μ = 10 and σ = 2.83

4. μ = 8 and σ = 2.83

2. Suppose the average number of Funko Pops owned by a Statistics instructor is 7 with a standard deviation of 2.3 Pops. What would be the z-score of Mr. James, who owns 13 Pops?

1. z = 13

2. z = 2.61

3. z = -2.61

4. z = 1.53

3. All of the following can be approximated using a normal distribution EXCEPT

1. The number of successful outcomes for a binomial experiment with 10 trails where the probability of success on any given trail is 0.85

2. The average sample mean for samples of size 20 from a population that is normally distributed

3. The average sample mean for samples of size 50 from a population that is strongly skewed to the left

4. The number of successful outcomes for a binomial experiment with 30 trails where the probability of success on any given trail is 0.25

(1)(A) Young's double slit experiment is one of the quintessential experiments in physics. The availability of low cost lasers in recent years allows us to perform the double slit experiment rather easily in class. Your professor shines a green laser (566 nm) on a double slit with a separation of 0.106 mm. The diffraction pattern shines on the classroom wall 4.0 m away. Calculate the fringe separation between the fourth order and central fringe.

(B)Working in lab class you shine a green laser (5.65 10² nm) onto a double slit with a separation of 0.280 mm. What is the distance between the first and second dark fringe that shines on the wall 2.20 m away?

(C)You shine an orange laser (587 nm) on a double slit in an experiment you perform in your physics lab. Measuring with a protractor you see that the interference pattern makes the first fringe at 11.0° with the horizontal. What is the separation between the slits?

(D)What is the separation between two slits for which 650 nm light has its first minimum at an angle of 31.5°?

A curious person decides to do an experiment in their apartment building. They take their bathroom scale into the elevator on the 15th floor of the highrise they live in. When the elevator is stationary, they step on the scale and it reads 532 N, as expected since this is the person's weight. When the elevator starts moving, the person looks at the scale and it reads 420 N. The combined mass of the person and the elevator is 795 kg.

(a) Explain why the reading on the scale is less than the person's weight.

(b) What is the elevator's acceleration (magnitude and direction) when the scale reads 420 N.

(c) In the next part of the experiment, the person chooses a different floor to travel to and then the scale reads 670 N. Did the person choose to go to a higher floor or a lower one? And what is the acceleration of the elevator?

(d) Using the calculations you made in parts (b) and (c), find the tension in the elevator cable when the scale read 420 N and 670 N.

(e) At one point during the experiment, the person looks at the scale and it reads 0 N. Explain how this is possible and what the person should do about it.