A horizontally projected beam of protons travels at 55 km/s into the space between two horizontal, parallel plates. The plates are separated by 7.4 cm, and they are 12 cm long. There is a uniform electric field between the plates of unknown strength. The beam enters the region exactly midway (vertically) between the plates and exits the region 7.2 microns closer to the lower plate. If it were a beam of electrons instead, everything else being the same, at what height above the lower plate would the beam exit the region between the plates? The proton mass is 1.67 × 10^-27 kg, and electron mass is 9.11 × 10^-31 kg. (THE ANSWER IS 5 CM)

You have two conducting plates with nothing in between them. Using a voltmeter, you measure the voltage difference between the plates to be 465 V. You release an alpha particle with mass of 6.5×10-27 kg and a charge of 3.2×10-19 C from near the positive plate. What is the kinetic energy of the alpha particle when it reaches the other plate? The distance between the plates is 44.0 cm. b.) You observe an electron move through a uniform electric field. The electron/field-system loses 2480 pJ of electrostatic potential energy as the electron picks up speed. What was the voltage difference between the two points

Burt Sbeez is saving up for his retirement. Today is his 40th birthday. Burt first started saving when he was just 25 years old. On his 25th birthday, Burt made the first contribution to his retirement account when he deposited $3,000. Each year on his birthday, Burt has contributed another $3,000 to the account. The 16th (and last) of these contributions is made today. The account has paid interest at the rate of 4.2% APR, compounded monthly. Burt wants to close the account today and immediately move the money to a stock fund which is expected to earn a return of 9%/ year. Burt’s plan is to continue making contributions to this account each year on his birthday. His next contribution will be one year from now (at age 41) and his final planned contribution will be on his 67th birthday. If Burt wants to accumulate $4,500,000 in his account by the instant that he reaches age 67, how much must he contribute each year until age 67 (27 contributions in all) to achieve his goal?

The data from data105.dat contains information on 78 seventh-grade students. We want to know how well each of IQ score and self-concept score predicts GPA using least-squares regression. We also want to know which of these explanatory variables predicts GPA better. Give numerical measures that answer these questions. (Round your answers to three decimal places.)
(Regressor: IQ) R ² =

(Regressor: Self-Concept) R ²  =

obs     gpa     iq      gender  concept
1       7.94    101     2       44
2       8.292   120     2       57
3       4.643   114     2       49
4       7.47    106     2       68
5       8.882   116     1       82
6       7.585   107     2       58
7       7.65    101     2       73
8       2.412   81      2       22
9       6       109     1       39
10      8.833   110     2       66
11      7.47    99      1       75
12      5.528   104     1       47
13      7.167   101     2       59
14      7.571   104     1       71
15      4.7     108     1       44
16      8.167   106     1       44
17      7.822   105     1       73
18      7.598   104     1       76
19      4       95      2       41
20      6.231   102     1       46
21      7.643   111     2       52
22      1.76    119     2       44
24      6.419   111     1       48
26      9.648   104     2       60
27      10.7    115     1       44
28      10.58   138     2       50
29      9.429   115     2       59
30      8       108     2       69
31      9.585   115     2       56
32      9.571   118     1       49
33      8.998   121     1       63
34      8.333   119     1       60
35      8.175   123     2       69
36      8       96      2       40
37      9.333   108     1       53
38      9.5     111     2       70
39      9.167   131     2       47
40      10.14   126     1       76
41      9.999   112     1       67
43      10.76   122     2       91
44      9.763   134     2       87
45      9.41    103     2       65
46      9.167   116     2       67
47      9.348   101     2       83
48      8.167   112     2       74
50      3.647   95      2       56
51      3.408   73      1       47
52      3.936   80      2       33
53      7.167   121     2       50
54      7.647   111     2       61
55      .53     81      2       27
56      6.173   106     2       46
57      7.295   117     2       74
58      7.295   112     1       69
59      8.938   98      1       68
60      7.882   102     1       51
61      8.353   114     2       58
62      5.062   116     2       56
63      8.175   123     2       50
64      8.235   91      2       64
65      7.588   102     2       38
68      7.647   115     2       44
69      5.237   105     1       40
71      7.825   86      2       75
72      7.333   111     1       57
74      9.167   116     2       50
76      7.996   106     2       40
77      8.714   118     1       68
78      7.833   114     1       71
79      4.885   102     2       65
80      7.998   131     1       55
83      3.82    98      2       31
84      5.936   111     1       57
85      9       117     1       56
86      9.5     111     1       53
87      6.057   97      2       58
88      6.057   110     1       43
89      6.938   121     2       43

True or False

Indirect costs are usually included in the costs that are allocated to activity cost pools in an activity-based costing system

In the first-stage allocation in an ABC system, some costs may be allocated to a special cost pool that are not subsequently allocated to products or customers.

The activity variance for revenue is favorable if the revenue in the flexible budget exceeds the revenue in the static planning budget.

A favorable spending variance occurs when the cost in the flexible budget exceeds the amount of that actual cost (i.e. the corresponding cost in the actual results).

If the required rate of return is 15% and the internal rate of return of a potential investment 10%, the company should deem the investment acceptable.

When cash flows are uneven and vary from year to year, the net present value method is harder to calculate than the internal rate of return method.

In capital budgeting computations, discounted cash flow methods assume that all cash flows occur at the beginning of a period.

Crooked Creek Wines operates a cellar door venue in which customers can sample and purchase wines. The average revenue per day is $750 , variable cost per day is $250 and annual fixed costs for the cellar door operations is $95,000. Assume 365 operating days. What is the operating profit (loss) fo r cellar door operations per year?

As CVP analysis allows us to play “what if” games with the information, calculate the operating profit under each of the following conditions:

a) Reduction in cellar door operations to 280 days per annum

b) Increase in the average daily revenue to $800

c) Increase in the average daily revenue to $800 AND decrease variable costs to $225 AND reduce the operating days to 290.

Once all of the options have been considered, which of the options would you recommend to the management o f Crooked Creek Wines and why?   

California Speeding: Listed below are the recorded speeds (in mi/hr) of randomly selected cars traveling on a section of Highway 405 in Los Angeles. That part of the highway has a posted speed limit of 65 mi/hr. Assume the standard deviation of speeds is 5.7 mi/hr. Use a 1% significance level to test the claim that sample is from a population with a mean weight that is greater than 65 mi/hr. 68 68 72 73 65 74 73 72 68 65 65 73 66 71 68 74 66 71 65 73 59 75 70 56 66 75 68 75 62 72 60 73 61 75 58 74 60 73 58 75

Seniors want to use technology to stay​ connected, read magazines and​ emails, share photos and​ ideas, listen to​ music, find recipes and discount coupons and much more. The Ontario Society of Senior Citizens Organizations​ (OSSCO) offers a variety of computer training​ opportunities, including using​ self-help instructions on iPad technology. Consulting with 20 seniors helped OSSCO develop these​ self-help instructions for both individual users and trainers who work with seniors. The ages of the seniors are listed below.

What is the median of the​ observations?

77 74 72 82

92 80 67 95

71 94 75 98

82 68 87 69

74 87 76 79

A. 82.5

B. 78

C. 80.5

D. 74